31979717792 has 48 divisors (see below), whose sum is σ = 68702945472. Its totient is φ = 14532165120.

The previous prime is 31979717717. The next prime is 31979717837. The reversal of 31979717792 is 29771797913.

It is a super-2 number, since 2×31979717792² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1501973 + ... + 1523115.

It is an arithmetic number, because the mean of its divisors is an integer number (1431311364).

Almost surely, 2^31979717792 is an apocalyptic number.

31979717792 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31979717792 is an abundant number, since it is smaller than the sum of its proper divisors (36723227680).

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

31979717792 is a wasteful number, since it uses less digits than its factorization.

31979717792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25461 (or 25453 counting only the distinct ones).

The product of its digits is 10501974, while the sum is 62.

The spelling of 31979717792 in words is "thirty-one billion, nine hundred seventy-nine million, seven hundred seventeen thousand, seven hundred ninety-two".