316646336557 has 2 divisors, whose sum is σ = 316646336558. Its totient is φ = 316646336556.

The previous prime is 316646336527. The next prime is 316646336569. The reversal of 316646336557 is 755633646613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243353769481 + 73292567076 = 493309^2 + 270726^2 .

It is a cyclic number.

It is not a de Polignac number, because 316646336557 - 2¹⁹ = 316645812269 is a prime.

It is a super-2 number, since 2×316646336557² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 316646336498 and 316646336507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316646336527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158323168278 + 158323168279.

It is an arithmetic number, because the mean of its divisors is an integer number (158323168279).

Almost surely, 2^316646336557 is an apocalyptic number.

It is an amenable number.

316646336557 is a deficient number, since it is larger than the sum of its proper divisors (1).

316646336557 is an equidigital number, since it uses as much as digits as its factorization.

316646336557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24494400, while the sum is 55.

The spelling of 316646336557 in words is "three hundred sixteen billion, six hundred forty-six million, three hundred thirty-six thousand, five hundred fifty-seven".