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79960000000 = 29571999
BaseRepresentation
bin100101001110111111…
…1001100011000000000
321122101112211212022111
41022131333030120000
52302224230000000
6100422204145104
75530324533346
oct1123577143000
9248345755274
1079960000000
1130a02376531
12135b6538194
137703a6b28a
143c27725996
15212ec1bcba
hex129dfcc600

79960000000 has 160 divisors (see below), whose sum is σ = 199804176000. Its totient is φ = 31968000000.

The previous prime is 79959999979. The next prime is 79960000027. The reversal of 79960000000 is 6997.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39999001 + ... + 40000999.

It is an arithmetic number, because the mean of its divisors is an integer number (1248776100).

Almost surely, 279960000000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79960000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99902088000).

79960000000 is an abundant number, since it is smaller than the sum of its proper divisors (119844176000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79960000000 is an frugal number, since it uses more digits than its factorization.

79960000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052 (or 2006 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 31.

Adding to 79960000000 its reverse (6997), we get a palindrome (79960006997).

The spelling of 79960000000 in words is "seventy-nine billion, nine hundred sixty million", and thus it is an aban number.

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 128 160 200 250 256 320 400 500 512 625 640 800 1000 1250 1280 1600 1999 2000 2500 2560 3125 3200 3998 4000 5000 6250 6400 7996 8000 9995 10000 12500 12800 15625 15992 16000 19990 20000 25000 31250 31984 32000 39980 40000 49975 50000 62500 63968 64000 78125 79960 80000 99950 100000 125000 127936 156250 159920 160000 199900 200000 249875 250000 255872 312500 319840 320000 399800 400000 499750 500000 511744 625000 639680 799600 800000 999500 1000000 1023488 1249375 1250000 1279360 1599200 1600000 1999000 2000000 2498750 2500000 2558720 3198400 3998000 4000000 4997500 5000000 5117440 6246875 6396800 7996000 8000000 9995000 10000000 12493750 12793600 15992000 19990000 20000000 24987500 25587200 31234375 31984000 39980000 40000000 49975000 62468750 63968000 79960000 99950000 124937500 127936000 156171875 159920000 199900000 249875000 312343750 319840000 399800000 499750000 624687500 639680000 799600000 999500000 1249375000 1599200000 1999000000 2498750000 3198400000 3998000000 4997500000 7996000000 9995000000 15992000000 19990000000 39980000000 79960000000