31979872512 has 108 divisors (see below), whose sum is σ = 105378174720. Its totient is φ = 9137101824.

The previous prime is 31979872511. The next prime is 31979872571. The reversal of 31979872512 is 21527897913.

It is a happy number.

31979872512 is a `hidden beast` number, since 31 + 9 + 7 + 98 + 7 + 2 + 512 = 666.

It is not an unprimeable number, because it can be changed into a prime (31979872511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 975312 + ... + 1007567.

It is an arithmetic number, because the mean of its divisors is an integer number (975723840).

Almost surely, 2^31979872512 is an apocalyptic number.

31979872512 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31979872512 is an abundant number, since it is smaller than the sum of its proper divisors (73398302208).

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

31979872512 is a wasteful number, since it uses less digits than its factorization.

31979872512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982908 (or 1982891 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The spelling of 31979872512 in words is "thirty-one billion, nine hundred seventy-nine million, eight hundred seventy-two thousand, five hundred twelve".