515615664713 has 2 divisors, whose sum is σ = 515615664714. Its totient is φ = 515615664712.

The previous prime is 515615664677. The next prime is 515615664727. The reversal of 515615664713 is 317466516515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 441842042944 + 73773621769 = 664712^2 + 271613^2 .

It is a cyclic number.

It is not a de Polignac number, because 515615664713 - 2⁸ = 515615664457 is a prime.

It is not a weakly prime, because it can be changed into another prime (515615660713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257807832356 + 257807832357.

It is an arithmetic number, because the mean of its divisors is an integer number (257807832357).

Almost surely, 2^515615664713 is an apocalyptic number.

It is an amenable number.

515615664713 is a deficient number, since it is larger than the sum of its proper divisors (1).

515615664713 is an equidigital number, since it uses as much as digits as its factorization.

515615664713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268000, while the sum is 50.

The spelling of 515615664713 in words is "five hundred fifteen billion, six hundred fifteen million, six hundred sixty-four thousand, seven hundred thirteen".