115812565613 has 2 divisors, whose sum is σ = 115812565614. Its totient is φ = 115812565612.

The previous prime is 115812565579. The next prime is 115812565669. The reversal of 115812565613 is 316565218511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113856980329 + 1955585284 = 337427^2 + 44222^2 .

It is a cyclic number.

It is not a de Polignac number, because 115812565613 - 2⁸ = 115812565357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115812565313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57906282806 + 57906282807.

It is an arithmetic number, because the mean of its divisors is an integer number (57906282807).

Almost surely, 2^115812565613 is an apocalyptic number.

It is an amenable number.

115812565613 is a deficient number, since it is larger than the sum of its proper divisors (1).

115812565613 is an equidigital number, since it uses as much as digits as its factorization.

115812565613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216000, while the sum is 44.

The spelling of 115812565613 in words is "one hundred fifteen billion, eight hundred twelve million, five hundred sixty-five thousand, six hundred thirteen".