173172999852 has 36 divisors (see below), whose sum is σ = 438753853720. Its totient is φ = 57591015552.

The previous prime is 173172999841. The next prime is 173172999859. The reversal of 173172999852 is 258999271371.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 173172999852.

It is not an unprimeable number, because it can be changed into a prime (173172999859) 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 11 ways as a sum of consecutive naturals, for example, 5539102 + ... + 5570277.

Almost surely, 2^173172999852 is an apocalyptic number.

173172999852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

173172999852 is an abundant number, since it is smaller than the sum of its proper divisors (265580853868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

173172999852 is a wasteful number, since it uses less digits than its factorization.

173172999852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11109822 (or 11109817 counting only the distinct ones).

The product of its digits is 17146080, while the sum is 63.

It can be divided in two parts, 17317 and 2999852, that added together give a square (3017169 = 1737²).

The spelling of 173172999852 in words is "one hundred seventy-three billion, one hundred seventy-two million, nine hundred ninety-nine thousand, eight hundred fifty-two".