31059985656 has 32 divisors (see below), whose sum is σ = 88742816640. Its totient is φ = 8874281568.

The previous prime is 31059985633. The next prime is 31059985669. The reversal of 31059985656 is 65658995013.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31059985596 and 31059985605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92440266 + ... + 92440601.

It is an arithmetic number, because the mean of its divisors is an integer number (2773213020).

Almost surely, 2^31059985656 is an apocalyptic number.

It is an amenable number.

31059985656 is an abundant number, since it is smaller than the sum of its proper divisors (57682830984).

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

31059985656 is a wasteful number, since it uses less digits than its factorization.

31059985656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184880883 (or 184880879 counting only the distinct ones).

The product of its (nonzero) digits is 8748000, while the sum is 57.

The spelling of 31059985656 in words is "thirty-one billion, fifty-nine million, nine hundred eighty-five thousand, six hundred fifty-six".