31208232768 has 28 divisors (see below), whose sum is σ = 82571783040. Its totient is φ = 10402744192.

The previous prime is 31208232739. The next prime is 31208232779. The reversal of 31208232768 is 86723280213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81271248 + ... + 81271631.

Almost surely, 2^31208232768 is an apocalyptic number.

It is an amenable number.

31208232768 is an abundant number, since it is smaller than the sum of its proper divisors (51363550272).

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

31208232768 is a wasteful number, since it uses less digits than its factorization.

31208232768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162542894 (or 162542884 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 31208232768 in words is "thirty-one billion, two hundred eight million, two hundred thirty-two thousand, seven hundred sixty-eight".