79631915831 has 32 divisors (see below), whose sum is σ = 91874901888. Its totient is φ = 68369817600.

The previous prime is 79631915827. The next prime is 79631915837. The reversal of 79631915831 is 13851913697.

It is a cyclic number.

It is not a de Polignac number, because 79631915831 - 2² = 79631915827 is a prime.

It is a super-2 number, since 2×79631915831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79631915837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6568031 + ... + 6580143.

It is an arithmetic number, because the mean of its divisors is an integer number (2871090684).

Almost surely, 2^79631915831 is an apocalyptic number.

79631915831 is a deficient number, since it is larger than the sum of its proper divisors (12242986057).

79631915831 is a wasteful number, since it uses less digits than its factorization.

79631915831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12491.

The product of its digits is 1224720, while the sum is 53.

The spelling of 79631915831 in words is "seventy-nine billion, six hundred thirty-one million, nine hundred fifteen thousand, eight hundred thirty-one".