115531345657 has 32 divisors (see below), whose sum is σ = 144049086720. Its totient is φ = 90222612480.

The previous prime is 115531345649. The next prime is 115531345661. The reversal of 115531345657 is 756543135511.

It is not a de Polignac number, because 115531345657 - 2³ = 115531345649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115531345627) 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, 2454894 + ... + 2501512.

It is an arithmetic number, because the mean of its divisors is an integer number (4501533960).

Almost surely, 2^115531345657 is an apocalyptic number.

It is an amenable number.

115531345657 is a deficient number, since it is larger than the sum of its proper divisors (28517741063).

115531345657 is a wasteful number, since it uses less digits than its factorization.

115531345657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46993.

The product of its digits is 945000, while the sum is 46.

The spelling of 115531345657 in words is "one hundred fifteen billion, five hundred thirty-one million, three hundred forty-five thousand, six hundred fifty-seven".