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80638083560 = 23517130790731
BaseRepresentation
bin100101100011001100…
…1111000000111101000
321201010210210002002102
41023012121320013220
52310121322133220
6101013345552532
75553200254346
oct1130631700750
9251123702072
1080638083560
1131220106771
1213765645748
1377b13a5b58
143c8d7d6996
15216e510775
hex12c66781e8

80638083560 has 64 divisors (see below), whose sum is σ = 192257478720. Its totient is φ = 30334305280.

The previous prime is 80638083557. The next prime is 80638083563. The reversal of 80638083560 is 6538083608.

It is an interprime number because it is at equal distance from previous prime (80638083557) and next prime (80638083563).

It is not an unprimeable number, because it can be changed into a prime (80638083563) 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 15 ways as a sum of consecutive naturals, for example, 843395 + ... + 934125.

It is an arithmetic number, because the mean of its divisors is an integer number (3004023105).

Almost surely, 280638083560 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 80638083560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96128739360).

80638083560 is an abundant number, since it is smaller than the sum of its proper divisors (111619395160).

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

80638083560 is a wasteful number, since it uses less digits than its factorization.

80638083560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92066 (or 92062 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 80638083560 in words is "eighty billion, six hundred thirty-eight million, eighty-three thousand, five hundred sixty".

Divisors: 1 2 4 5 8 10 17 20 34 40 68 85 136 170 340 680 1307 2614 5228 6535 10456 13070 22219 26140 44438 52280 88876 90731 111095 177752 181462 222190 362924 444380 453655 725848 888760 907310 1542427 1814620 3084854 3629240 6169708 7712135 12339416 15424270 30848540 61697080 118585417 237170834 474341668 592927085 948683336 1185854170 2015952089 2371708340 4031904178 4743416680 8063808356 10079760445 16127616712 20159520890 40319041780 80638083560