31897601004 has 24 divisors (see below), whose sum is σ = 76994210160. Its totient is φ = 10265894464.

The previous prime is 31897600997. The next prime is 31897601009. The reversal of 31897601004 is 40010679813.

It is not an unprimeable number, because it can be changed into a prime (31897601009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45829539 + ... + 45830234.

It is an arithmetic number, because the mean of its divisors is an integer number (3208092090).

Almost surely, 2^31897601004 is an apocalyptic number.

It is an amenable number.

31897601004 is an abundant number, since it is smaller than the sum of its proper divisors (45096609156).

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

31897601004 is a wasteful number, since it uses less digits than its factorization.

31897601004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91659809 (or 91659807 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 31897601004 in words is "thirty-one billion, eight hundred ninety-seven million, six hundred one thousand, four".