31091479904 has 24 divisors (see below), whose sum is σ = 61254456480. Its totient is φ = 15534792576.

The previous prime is 31091479883. The next prime is 31091479927. The reversal of 31091479904 is 40997419013.

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, 295859 + ... + 386930.

It is an arithmetic number, because the mean of its divisors is an integer number (2552269020).

Almost surely, 2^31091479904 is an apocalyptic number.

It is an amenable number.

31091479904 is a deficient number, since it is larger than the sum of its proper divisors (30162976576).

31091479904 is a wasteful number, since it uses less digits than its factorization.

31091479904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684222 (or 684214 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 31091479904 in words is "thirty-one billion, ninety-one million, four hundred seventy-nine thousand, nine hundred four".