115665715205 has 16 divisors (see below), whose sum is σ = 144866930544. Its totient is φ = 88572357120.

The previous prime is 115665715181. The next prime is 115665715211. The reversal of 115665715205 is 502517566511.

It can be written as a sum of positive squares in 8 ways, for example, as 22827281569 + 92838433636 = 151087^2 + 304694^2 .

It is not a de Polignac number, because 115665715205 - 2⁸ = 115665714949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 5311994 + ... + 5333723.

It is an arithmetic number, because the mean of its divisors is an integer number (9054183159).

Almost surely, 2^115665715205 is an apocalyptic number.

It is an amenable number.

115665715205 is a deficient number, since it is larger than the sum of its proper divisors (29201215339).

115665715205 is a wasteful number, since it uses less digits than its factorization.

115665715205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10645816.

The product of its (nonzero) digits is 315000, while the sum is 44.

The spelling of 115665715205 in words is "one hundred fifteen billion, six hundred sixty-five million, seven hundred fifteen thousand, two hundred five".