115516506156565 has 16 divisors (see below), whose sum is σ = 147143621338992. Its totient is φ = 86758048041984.

The previous prime is 115516506156553. The next prime is 115516506156593. The reversal of 115516506156565 is 565651605615511.

It can be written as a sum of positive squares in 8 ways, for example, as 1862698147249 + 113653808009316 = 1364807^2 + 10660854^2 .

It is a cyclic number.

It is not a de Polignac number, because 115516506156565 - 2⁵ = 115516506156533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1711575474 + ... + 1711642963.

It is an arithmetic number, because the mean of its divisors is an integer number (9196476333687).

Almost surely, 2^{115516506156565} is an apocalyptic number.

It is an amenable number.

115516506156565 is a deficient number, since it is larger than the sum of its proper divisors (31627115182427).

115516506156565 is a wasteful number, since it uses less digits than its factorization.

115516506156565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3423218856.

The product of its (nonzero) digits is 20250000, while the sum is 58.

The spelling of 115516506156565 in words is "one hundred fifteen trillion, five hundred sixteen billion, five hundred six million, one hundred fifty-six thousand, five hundred sixty-five".