80931172656 has 40 divisors (see below), whose sum is σ = 210718449664. Its totient is φ = 26764637760.

The previous prime is 80931172633. The next prime is 80931172687. The reversal of 80931172656 is 65627113908.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6631960 + ... + 6644151.

Almost surely, 2^80931172656 is an apocalyptic number.

It is an amenable number.

80931172656 is an abundant number, since it is smaller than the sum of its proper divisors (129787277008).

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

80931172656 is a wasteful number, since it uses less digits than its factorization.

80931172656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13276249 (or 13276243 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 80931172656 in words is "eighty billion, nine hundred thirty-one million, one hundred seventy-two thousand, six hundred fifty-six".