313715565661 has 2 divisors, whose sum is σ = 313715565662. Its totient is φ = 313715565660.

The previous prime is 313715565613. The next prime is 313715565677. The reversal of 313715565661 is 166565517313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198977552761 + 114738012900 = 446069^2 + 338730^2 .

It is a cyclic number.

It is not a de Polignac number, because 313715565661 - 2⁷ = 313715565533 is a prime.

It is a super-2 number, since 2×313715565661² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313715565061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156857782830 + 156857782831.

It is an arithmetic number, because the mean of its divisors is an integer number (156857782831).

Almost surely, 2^313715565661 is an apocalyptic number.

It is an amenable number.

313715565661 is a deficient number, since it is larger than the sum of its proper divisors (1).

313715565661 is an equidigital number, since it uses as much as digits as its factorization.

313715565661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1701000, while the sum is 49.

The spelling of 313715565661 in words is "three hundred thirteen billion, seven hundred fifteen million, five hundred sixty-five thousand, six hundred sixty-one".