31991642682 has 16 divisors (see below), whose sum is σ = 64219389312. Its totient is φ = 10624530240.

The previous prime is 31991642623. The next prime is 31991642687. The reversal of 31991642682 is 28624619913.

It is not an unprimeable number, because it can be changed into a prime (31991642687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9835903 + ... + 9839154.

It is an arithmetic number, because the mean of its divisors is an integer number (4013711832).

Almost surely, 2^31991642682 is an apocalyptic number.

31991642682 is an abundant number, since it is smaller than the sum of its proper divisors (32227746630).

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

31991642682 is a wasteful number, since it uses less digits than its factorization.

31991642682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19675333.

The product of its digits is 1119744, while the sum is 51.

The spelling of 31991642682 in words is "thirty-one billion, nine hundred ninety-one million, six hundred forty-two thousand, six hundred eighty-two".