31607402540 has 48 divisors (see below), whose sum is σ = 77101356864. Its totient is φ = 10659168000.

The previous prime is 31607402527. The next prime is 31607402543. The reversal of 31607402540 is 4520470613.

It is a junction number, because it is equal to n+sod(n) for n = 31607402497 and 31607402506.

It is not an unprimeable number, because it can be changed into a prime (31607402543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1842011 + ... + 1859090.

It is an arithmetic number, because the mean of its divisors is an integer number (1606278268).

Almost surely, 2^31607402540 is an apocalyptic number.

It is an amenable number.

31607402540 is an abundant number, since it is smaller than the sum of its proper divisors (45493954324).

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

31607402540 is a wasteful number, since it uses less digits than its factorization.

31607402540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3701178 (or 3701176 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 31607402540 in words is "thirty-one billion, six hundred seven million, four hundred two thousand, five hundred forty".