31487802912 has 72 divisors (see below), whose sum is σ = 90248610816. Its totient is φ = 10413277056.

The previous prime is 31487802893. The next prime is 31487802943. The reversal of 31487802912 is 21920878413.

It is a happy number.

31487802912 is a `hidden beast` number, since 3 + 1 + 487 + 80 + 2 + 91 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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 11 ways as a sum of consecutive naturals, for example, 393868 + ... + 467019.

It is an arithmetic number, because the mean of its divisors is an integer number (1253452928).

Almost surely, 2^31487802912 is an apocalyptic number.

31487802912 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31487802912 is an abundant number, since it is smaller than the sum of its proper divisors (58760807904).

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

31487802912 is a wasteful number, since it uses less digits than its factorization.

31487802912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861030 (or 861019 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 31487802912 in words is "thirty-one billion, four hundred eighty-seven million, eight hundred two thousand, nine hundred twelve".