31479604640660 has 24 divisors (see below), whose sum is σ = 72116912450016. Its totient is φ = 11447128960160.

The previous prime is 31479604640597. The next prime is 31479604640669. The reversal of 31479604640660 is 6604640697413.

It is a junction number, because it is equal to n+sod(n) for n = 31479604640596 and 31479604640605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31479604640669) 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, 71544555782 + ... + 71544556221.

It is an arithmetic number, because the mean of its divisors is an integer number (3004871352084).

Almost surely, 2^{31479604640660} is an apocalyptic number.

It is an amenable number.

31479604640660 is an abundant number, since it is smaller than the sum of its proper divisors (40637307809356).

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

31479604640660 is a wasteful number, since it uses less digits than its factorization.

31479604640660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143089112023 (or 143089112021 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 56.

The spelling of 31479604640660 in words is "thirty-one trillion, four hundred seventy-nine billion, six hundred four million, six hundred forty thousand, six hundred sixty".