318749656664 has 16 divisors (see below), whose sum is σ = 606073291920. Its totient is φ = 157130112160.

The previous prime is 318749656609. The next prime is 318749656691. The reversal of 318749656664 is 466656947813.

It is a self number, because there is not a number n which added to its sum of digits gives 318749656664.

It is a congruent number.

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, 280588919 + ... + 280590054.

It is an arithmetic number, because the mean of its divisors is an integer number (37879580745).

Almost surely, 2^318749656664 is an apocalyptic number.

It is an amenable number.

318749656664 is a deficient number, since it is larger than the sum of its proper divisors (287323635256).

318749656664 is a wasteful number, since it uses less digits than its factorization.

318749656664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561179050 (or 561179046 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 65.

The spelling of 318749656664 in words is "three hundred eighteen billion, seven hundred forty-nine million, six hundred fifty-six thousand, six hundred sixty-four".