173180842109 has 6 divisors (see below), whose sum is σ = 190355801790. Its totient is φ = 157437129080.

The previous prime is 173180842013. The next prime is 173180842111. The reversal of 173180842109 is 901248081371.

It can be written as a sum of positive squares in only one way, i.e., 127005278884 + 46175563225 = 356378^2 + 214885^2 .

It is not a de Polignac number, because 173180842109 - 2⁸ = 173180841853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 173180842109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173180842129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 715623194 + ... + 715623435.

It is an arithmetic number, because the mean of its divisors is an integer number (31725966965).

Almost surely, 2^173180842109 is an apocalyptic number.

It is an amenable number.

173180842109 is a deficient number, since it is larger than the sum of its proper divisors (17174959681).

173180842109 is a wasteful number, since it uses less digits than its factorization.

173180842109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431246651 (or 1431246640 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 44.

The spelling of 173180842109 in words is "one hundred seventy-three billion, one hundred eighty million, eight hundred forty-two thousand, one hundred nine".