115970831161 has 4 divisors (see below), whose sum is σ = 116174646900. Its totient is φ = 115767015424.

The previous prime is 115970831153. The next prime is 115970831167. The reversal of 115970831161 is 161138079511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161138079511 = 23 ⋅7006003457.

It can be written as a sum of positive squares in 2 ways, for example, as 58876596025 + 57094235136 = 242645^2 + 238944^2 .

It is a cyclic number.

It is not a de Polignac number, because 115970831161 - 2³ = 115970831153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115970831167) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 101907016 + ... + 101908153.

It is an arithmetic number, because the mean of its divisors is an integer number (29043661725).

Almost surely, 2^115970831161 is an apocalyptic number.

It is an amenable number.

115970831161 is a deficient number, since it is larger than the sum of its proper divisors (203815739).

115970831161 is an equidigital number, since it uses as much as digits as its factorization.

115970831161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203815738.

The product of its (nonzero) digits is 45360, while the sum is 43.

The spelling of 115970831161 in words is "one hundred fifteen billion, nine hundred seventy million, eight hundred thirty-one thousand, one hundred sixty-one".