13515665117 has 2 divisors, whose sum is σ = 13515665118. Its totient is φ = 13515665116.

The previous prime is 13515665083. The next prime is 13515665173. The reversal of 13515665117 is 71156651531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13448113156 + 67551961 = 115966^2 + 8219^2 .

It is a cyclic number.

It is not a de Polignac number, because 13515665117 - 2¹⁰ = 13515664093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13515665197) 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, 6757832558 + 6757832559.

It is an arithmetic number, because the mean of its divisors is an integer number (6757832559).

Almost surely, 2^13515665117 is an apocalyptic number.

It is an amenable number.

13515665117 is a deficient number, since it is larger than the sum of its proper divisors (1).

13515665117 is an equidigital number, since it uses as much as digits as its factorization.

13515665117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94500, while the sum is 41.

The spelling of 13515665117 in words is "thirteen billion, five hundred fifteen million, six hundred sixty-five thousand, one hundred seventeen".