318856513825 has 6 divisors (see below), whose sum is σ = 395382077174. Its totient is φ = 255085211040.

The previous prime is 318856513799. The next prime is 318856513831. The reversal of 318856513825 is 528315658813.

It can be written as a sum of positive squares in 3 ways, for example, as 47357158689 + 271499355136 = 217617^2 + 521056^2 .

It is not a de Polignac number, because 318856513825 - 2⁵ = 318856513793 is a prime.

It is a super-2 number, since 2×318856513825² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6377130252 + ... + 6377130301.

Almost surely, 2^318856513825 is an apocalyptic number.

It is an amenable number.

318856513825 is a deficient number, since it is larger than the sum of its proper divisors (76525563349).

318856513825 is a wasteful number, since it uses less digits than its factorization.

318856513825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12754260563 (or 12754260558 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 55.

The spelling of 318856513825 in words is "three hundred eighteen billion, eight hundred fifty-six million, five hundred thirteen thousand, eight hundred twenty-five".