31423556656 has 20 divisors (see below), whose sum is σ = 60885901912. Its totient is φ = 15711065856.

The previous prime is 31423556629. The next prime is 31423556677. The reversal of 31423556656 is 65665532413.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 618391 + ... + 667273.

Almost surely, 2^31423556656 is an apocalyptic number.

It is an amenable number.

31423556656 is a deficient number, since it is larger than the sum of its proper divisors (29462345256).

31423556656 is a wasteful number, since it uses less digits than its factorization.

31423556656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89068 (or 89062 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 46.

The spelling of 31423556656 in words is "thirty-one billion, four hundred twenty-three million, five hundred fifty-six thousand, six hundred fifty-six".