115616156591 has 32 divisors (see below), whose sum is σ = 131933058432. Its totient is φ = 100508221440.

The previous prime is 115616156543. The next prime is 115616156627. The reversal of 115616156591 is 195651616511.

It is a cyclic number.

It is not a de Polignac number, because 115616156591 - 2⁶ = 115616156527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115616156501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13375631 + ... + 13384271.

It is an arithmetic number, because the mean of its divisors is an integer number (4122908076).

Almost surely, 2^115616156591 is an apocalyptic number.

115616156591 is a deficient number, since it is larger than the sum of its proper divisors (16316901841).

115616156591 is a wasteful number, since it uses less digits than its factorization.

115616156591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9363.

The product of its digits is 243000, while the sum is 47.

The spelling of 115616156591 in words is "one hundred fifteen billion, six hundred sixteen million, one hundred fifty-six thousand, five hundred ninety-one".