115172775321 has 24 divisors (see below), whose sum is σ = 158602949472. Its totient is φ = 74336870400.

The previous prime is 115172775313. The next prime is 115172775343. The reversal of 115172775321 is 123577271511.

It is not a de Polignac number, because 115172775321 - 2³ = 115172775313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115172775371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 573465 + ... + 747801.

It is an arithmetic number, because the mean of its divisors is an integer number (6608456228).

Almost surely, 2^115172775321 is an apocalyptic number.

It is an amenable number.

115172775321 is a deficient number, since it is larger than the sum of its proper divisors (43430174151).

115172775321 is a wasteful number, since it uses less digits than its factorization.

115172775321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174553 (or 174512 counting only the distinct ones).

The product of its digits is 102900, while the sum is 42.

The spelling of 115172775321 in words is "one hundred fifteen billion, one hundred seventy-two million, seven hundred seventy-five thousand, three hundred twenty-one".