31813663064 has 16 divisors (see below), whose sum is σ = 60540927000. Its totient is φ = 15669415872.

The previous prime is 31813663051. The next prime is 31813663073. The reversal of 31813663064 is 46036631813.

It is a congruent number.

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, 29676389 + ... + 29677460.

Almost surely, 2^31813663064 is an apocalyptic number.

It is an amenable number.

31813663064 is a deficient number, since it is larger than the sum of its proper divisors (28727263936).

31813663064 is a wasteful number, since it uses less digits than its factorization.

31813663064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59353922 (or 59353918 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 31813663064 in words is "thirty-one billion, eight hundred thirteen million, six hundred sixty-three thousand, sixty-four".