31856870680 has 64 divisors (see below), whose sum is σ = 72391888800. Its totient is φ = 12616335360.

The previous prime is 31856870671. The next prime is 31856870687. The reversal of 31856870680 is 8607865813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31856870687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2066200 + ... + 2081560.

Almost surely, 2^31856870680 is an apocalyptic number.

It is an amenable number.

31856870680 is an abundant number, since it is smaller than the sum of its proper divisors (40535018120).

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

31856870680 is a wasteful number, since it uses less digits than its factorization.

31856870680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15884 (or 15880 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 31856870680 in words is "thirty-one billion, eight hundred fifty-six million, eight hundred seventy thousand, six hundred eighty".