18507811868664 has 64 divisors (see below), whose sum is σ = 46307451168000. Its totient is φ = 6164216413440.

The previous prime is 18507811868621. The next prime is 18507811868773. The reversal of 18507811868664 is 46686811870581.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155299852 + ... + 155418980.

It is an arithmetic number, because the mean of its divisors is an integer number (723553924500).

Almost surely, 2^{18507811868664} is an apocalyptic number.

It is an amenable number.

18507811868664 is an abundant number, since it is smaller than the sum of its proper divisors (27799639299336).

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

18507811868664 is a wasteful number, since it uses less digits than its factorization.

18507811868664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124388 (or 124384 counting only the distinct ones).

The product of its (nonzero) digits is 123863040, while the sum is 69.

The spelling of 18507811868664 in words is "eighteen trillion, five hundred seven billion, eight hundred eleven million, eight hundred sixty-eight thousand, six hundred sixty-four".