31697110992 has 20 divisors (see below), whose sum is σ = 81884203520. Its totient is φ = 10565703648.

The previous prime is 31697110969. The next prime is 31697111071. The reversal of 31697110992 is 29901179613.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 660356479 = 31697110992 / (3 + 1 + 6 + 9 + 7 + 1 + 1 + 0 + 9 + 9 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330178192 + ... + 330178287.

It is an arithmetic number, because the mean of its divisors is an integer number (4094210176).

Almost surely, 2^31697110992 is an apocalyptic number.

It is an amenable number.

31697110992 is an abundant number, since it is smaller than the sum of its proper divisors (50187092528).

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

31697110992 is a wasteful number, since it uses less digits than its factorization.

31697110992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660356490 (or 660356484 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 48.

The spelling of 31697110992 in words is "thirty-one billion, six hundred ninety-seven million, one hundred ten thousand, nine hundred ninety-two".