318187617568 has 12 divisors (see below), whose sum is σ = 626431872150. Its totient is φ = 159093808768.

The previous prime is 318187617533. The next prime is 318187617599. The reversal of 318187617568 is 865716781813.

It can be written as a sum of positive squares in only one way, i.e., 215344258704 + 102843358864 = 464052^2 + 320692^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4971681493 + ... + 4971681556.

Almost surely, 2^318187617568 is an apocalyptic number.

It is an amenable number.

318187617568 is a deficient number, since it is larger than the sum of its proper divisors (308244254582).

318187617568 is an equidigital number, since it uses as much as digits as its factorization.

318187617568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9943363059 (or 9943363051 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 61.

The spelling of 318187617568 in words is "three hundred eighteen billion, one hundred eighty-seven million, six hundred seventeen thousand, five hundred sixty-eight".