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68881480580 = 225118913925309
BaseRepresentation
bin100000000100110100…
…1111111101110000100
320120210110122202200102
41000021221333232010
52112032124334310
651351013103232
74655642632043
oct1001151775604
9216713582612
1068881480580
1127237888960
1211424327b18
1366597b1443
14349625655a
151bd231c8a5
hex1009a7fb84

68881480580 has 96 divisors (see below), whose sum is σ = 160728624000. Its totient is φ = 24587228160.

The previous prime is 68881480579. The next prime is 68881480589. The reversal of 68881480580 is 8508418886.

It is a super-3 number, since 3×688814805803 (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (68881480589) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2708966 + ... + 2734274.

It is an arithmetic number, because the mean of its divisors is an integer number (1674256500).

Almost surely, 268881480580 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 68881480580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80364312000).

68881480580 is an abundant number, since it is smaller than the sum of its proper divisors (91847143420).

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

68881480580 is a wasteful number, since it uses less digits than its factorization.

68881480580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25557 (or 25555 counting only the distinct ones).

The product of its (nonzero) digits is 3932160, while the sum is 56.

The spelling of 68881480580 in words is "sixty-eight billion, eight hundred eighty-one million, four hundred eighty thousand, five hundred eighty".

Divisors: 1 2 4 5 10 11 20 22 44 55 89 110 139 178 220 278 356 445 556 695 890 979 1390 1529 1780 1958 2780 3058 3916 4895 6116 7645 9790 12371 15290 19580 24742 25309 30580 49484 50618 61855 101236 123710 126545 136081 247420 253090 272162 278399 506180 544324 556798 680405 1113596 1360810 1391995 2252501 2721620 2783990 3517951 4505002 5567980 7035902 9010004 11262505 14071804 17589755 22525010 24777511 35179510 38697461 45050020 49555022 70359020 77394922 99110044 123887555 154789844 193487305 247775110 313097639 386974610 495550220 626195278 773949220 1252390556 1565488195 3130976390 3444074029 6261952780 6888148058 13776296116 17220370145 34440740290 68881480580