31995690684 has 24 divisors (see below), whose sum is σ = 79048177488. Its totient is φ = 10037863680.

The previous prime is 31995690679. The next prime is 31995690739. The reversal of 31995690684 is 48609659913.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78420607 + ... + 78421014.

It is an arithmetic number, because the mean of its divisors is an integer number (3293674062).

Almost surely, 2^31995690684 is an apocalyptic number.

31995690684 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31995690684 is an abundant number, since it is smaller than the sum of its proper divisors (47052486804).

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

31995690684 is a wasteful number, since it uses less digits than its factorization.

31995690684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156841645 (or 156841643 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 60.

The spelling of 31995690684 in words is "thirty-one billion, nine hundred ninety-five million, six hundred ninety thousand, six hundred eighty-four".