318904160657 has 4 divisors (see below), whose sum is σ = 319005822756. Its totient is φ = 318802498560.

The previous prime is 318904160651. The next prime is 318904160669. The reversal of 318904160657 is 756061409813.

It is a Cunningham number, because it is equal to 564716²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 756061409813 = 29 ⋅26071083097.

It can be written as a sum of positive squares in 2 ways, for example, as 318497694736 + 406465921 = 564356^2 + 20161^2 .

It is a cyclic number.

It is not a de Polignac number, because 318904160657 - 2⁸ = 318904160401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318904160651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50826344 + ... + 50832617.

It is an arithmetic number, because the mean of its divisors is an integer number (79751455689).

Almost surely, 2^318904160657 is an apocalyptic number.

It is an amenable number.

318904160657 is a deficient number, since it is larger than the sum of its proper divisors (101662099).

318904160657 is a wasteful number, since it uses less digits than its factorization.

318904160657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101662098.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 318904160657 in words is "three hundred eighteen billion, nine hundred four million, one hundred sixty thousand, six hundred fifty-seven".