31607489656 has 16 divisors (see below), whose sum is σ = 59274615240. Its totient is φ = 15800925600.

The previous prime is 31607489651. The next prime is 31607489699. The reversal of 31607489656 is 65698470613.

It is a junction number, because it is equal to n+sod(n) for n = 31607489597 and 31607489606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31607489651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304371 + ... + 394786.

Almost surely, 2^31607489656 is an apocalyptic number.

It is an amenable number.

31607489656 is a deficient number, since it is larger than the sum of its proper divisors (27667125584).

31607489656 is a wasteful number, since it uses less digits than its factorization.

31607489656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704814 (or 704810 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 31607489656 in words is "thirty-one billion, six hundred seven million, four hundred eighty-nine thousand, six hundred fifty-six".