115415518693 has 2 divisors, whose sum is σ = 115415518694. Its totient is φ = 115415518692.

The previous prime is 115415518681. The next prime is 115415518711. The reversal of 115415518693 is 396815514511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73104262884 + 42311255809 = 270378^2 + 205697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115415518693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115415518093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57707759346 + 57707759347.

It is an arithmetic number, because the mean of its divisors is an integer number (57707759347).

Almost surely, 2^115415518693 is an apocalyptic number.

It is an amenable number.

115415518693 is a deficient number, since it is larger than the sum of its proper divisors (1).

115415518693 is an equidigital number, since it uses as much as digits as its factorization.

115415518693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648000, while the sum is 49.

The spelling of 115415518693 in words is "one hundred fifteen billion, four hundred fifteen million, five hundred eighteen thousand, six hundred ninety-three".