185373681172 has 48 divisors (see below), whose sum is σ = 333566634240. Its totient is φ = 90097660800.

The previous prime is 185373681137. The next prime is 185373681173. The reversal of 185373681172 is 271186373581.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185373681173) 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, 20186422 + ... + 20195602.

It is an arithmetic number, because the mean of its divisors is an integer number (6949304880).

Almost surely, 2^185373681172 is an apocalyptic number.

It is an amenable number.

185373681172 is a deficient number, since it is larger than the sum of its proper divisors (148192953068).

185373681172 is a wasteful number, since it uses less digits than its factorization.

185373681172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9952 (or 9950 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 52.

The spelling of 185373681172 in words is "one hundred eighty-five billion, three hundred seventy-three million, six hundred eighty-one thousand, one hundred seventy-two".