316686218857 has 2 divisors, whose sum is σ = 316686218858. Its totient is φ = 316686218856.

The previous prime is 316686218843. The next prime is 316686218867. The reversal of 316686218857 is 758812686613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202634122201 + 114052096656 = 450149^2 + 337716^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-316686218857 is a prime.

It is a super-2 number, since 2×316686218857² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 316686218795 and 316686218804.

It is not a weakly prime, because it can be changed into another prime (316686218837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158343109428 + 158343109429.

It is an arithmetic number, because the mean of its divisors is an integer number (158343109429).

Almost surely, 2^316686218857 is an apocalyptic number.

It is an amenable number.

316686218857 is a deficient number, since it is larger than the sum of its proper divisors (1).

316686218857 is an equidigital number, since it uses as much as digits as its factorization.

316686218857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23224320, while the sum is 61.

The spelling of 316686218857 in words is "three hundred sixteen billion, six hundred eighty-six million, two hundred eighteen thousand, eight hundred fifty-seven".