55165515173 has 4 divisors (see below), whose sum is σ = 58068963360. Its totient is φ = 52262066988.

The previous prime is 55165515169. The next prime is 55165515199. The reversal of 55165515173 is 37151556155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55165515173 - 2² = 55165515169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55165515113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1451724065 + ... + 1451724102.

It is an arithmetic number, because the mean of its divisors is an integer number (14517240840).

Almost surely, 2^55165515173 is an apocalyptic number.

It is an amenable number.

55165515173 is a deficient number, since it is larger than the sum of its proper divisors (2903448187).

55165515173 is a wasteful number, since it uses less digits than its factorization.

55165515173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2903448186.

The product of its digits is 393750, while the sum is 44.

The spelling of 55165515173 in words is "fifty-five billion, one hundred sixty-five million, five hundred fifteen thousand, one hundred seventy-three".