173172445165 has 16 divisors (see below), whose sum is σ = 210929851440. Its totient is φ = 136469939200.

The previous prime is 173172445163. The next prime is 173172445211. The reversal of 173172445165 is 561544271371.

It can be written as a sum of positive squares in 8 ways, for example, as 7245754884 + 165926690281 = 85122^2 + 407341^2 .

It is not a de Polignac number, because 173172445165 - 2¹ = 173172445163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173172445163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 770860 + ... + 969829.

It is an arithmetic number, because the mean of its divisors is an integer number (13183115715).

Almost surely, 2^173172445165 is an apocalyptic number.

It is an amenable number.

173172445165 is a deficient number, since it is larger than the sum of its proper divisors (37757406275).

173172445165 is a wasteful number, since it uses less digits than its factorization.

173172445165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740992.

The product of its digits is 705600, while the sum is 46.

It can be divided in two parts, 1731724 and 45165, that added together give a square (1776889 = 1333²).

The spelling of 173172445165 in words is "one hundred seventy-three billion, one hundred seventy-two million, four hundred forty-five thousand, one hundred sixty-five".