318562317529081 has 2 divisors, whose sum is σ = 318562317529082. Its totient is φ = 318562317529080.

The previous prime is 318562317528953. The next prime is 318562317529163. The reversal of 318562317529081 is 180925713265813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316603482156025 + 1958835373056 = 17793355^2 + 1399584^2 .

It is a cyclic number.

It is not a de Polignac number, because 318562317529081 - 2⁷ = 318562317528953 is a prime.

It is a super-2 number, since 2×318562317529081² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (318562317529381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159281158764540 + 159281158764541.

It is an arithmetic number, because the mean of its divisors is an integer number (159281158764541).

Almost surely, 2^{318562317529081} is an apocalyptic number.

It is an amenable number.

318562317529081 is a deficient number, since it is larger than the sum of its proper divisors (1).

318562317529081 is an equidigital number, since it uses as much as digits as its factorization.

318562317529081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21772800, while the sum is 61.

The spelling of 318562317529081 in words is "three hundred eighteen trillion, five hundred sixty-two billion, three hundred seventeen million, five hundred twenty-nine thousand, eighty-one".