81680088976 has 40 divisors (see below), whose sum is σ = 158567976000. Its totient is φ = 40759416960.

The previous prime is 81680088967. The next prime is 81680089009. The reversal of 81680088976 is 67988008618.

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, 22807506 + ... + 22811086.

It is an arithmetic number, because the mean of its divisors is an integer number (3964199400).

Almost surely, 2^81680088976 is an apocalyptic number.

It is an amenable number.

81680088976 is a deficient number, since it is larger than the sum of its proper divisors (76887887024).

81680088976 is a wasteful number, since it uses less digits than its factorization.

81680088976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6007 (or 6001 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 61.

The spelling of 81680088976 in words is "eighty-one billion, six hundred eighty million, eighty-eight thousand, nine hundred seventy-six".