18640166464 has 28 divisors (see below), whose sum is σ = 37018163200. Its totient is φ = 9312755328.

The previous prime is 18640166399. The next prime is 18640166507. The reversal of 18640166464 is 46466104681.

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, 32004 + ... + 195715.

Almost surely, 2^18640166464 is an apocalyptic number.

It is an amenable number.

18640166464 is a deficient number, since it is larger than the sum of its proper divisors (18377996736).

18640166464 is a wasteful number, since it uses less digits than its factorization.

18640166464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229010 (or 229000 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 46.

The spelling of 18640166464 in words is "eighteen billion, six hundred forty million, one hundred sixty-six thousand, four hundred sixty-four".