318562317529681 has 16 divisors (see below), whose sum is σ = 320135875922880. Its totient is φ = 316990285530880.

The previous prime is 318562317529619. The next prime is 318562317529759. The reversal of 318562317529681 is 186925713265813.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 318562317529681 - 2²³ = 318562309141073 is a prime.

It is a super-2 number, since 2×318562317529681² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318562317529081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5113574925 + ... + 5113637221.

It is an arithmetic number, because the mean of its divisors is an integer number (20008492245180).

Almost surely, 2^{318562317529681} is an apocalyptic number.

It is an amenable number.

318562317529681 is a deficient number, since it is larger than the sum of its proper divisors (1573558393199).

318562317529681 is a wasteful number, since it uses less digits than its factorization.

318562317529681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74144.

The product of its digits is 130636800, while the sum is 67.

The spelling of 318562317529681 in words is "three hundred eighteen trillion, five hundred sixty-two billion, three hundred seventeen million, five hundred twenty-nine thousand, six hundred eighty-one".