315662812817 has 6 divisors (see below), whose sum is σ = 346968215874. Its totient is φ = 286966193360.

The previous prime is 315662812799. The next prime is 315662812823. The reversal of 315662812817 is 718218266513.

It can be written as a sum of positive squares in only one way, i.e., 187730691841 + 127932120976 = 433279^2 + 357676^2 .

It is not a de Polignac number, because 315662812817 - 2⁸ = 315662812561 is a prime.

It is a super-2 number, since 2×315662812817² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315662812847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1304391668 + ... + 1304391909.

It is an arithmetic number, because the mean of its divisors is an integer number (57828035979).

Almost surely, 2^315662812817 is an apocalyptic number.

It is an amenable number.

315662812817 is a deficient number, since it is larger than the sum of its proper divisors (31305403057).

315662812817 is a wasteful number, since it uses less digits than its factorization.

315662812817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608783599 (or 2608783588 counting only the distinct ones).

The product of its digits is 967680, while the sum is 50.

The spelling of 315662812817 in words is "three hundred fifteen billion, six hundred sixty-two million, eight hundred twelve thousand, eight hundred seventeen".