188172225492 has 48 divisors (see below), whose sum is σ = 439602999360. Its totient is φ = 62647782912.

The previous prime is 188172225491. The next prime is 188172225511. The reversal of 188172225492 is 294522271881.

It is a super-2 number, since 2×188172225492² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188172225491) 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, 58491468 + ... + 58494684.

It is an arithmetic number, because the mean of its divisors is an integer number (9158395820).

Almost surely, 2^188172225492 is an apocalyptic number.

188172225492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

188172225492 is an abundant number, since it is smaller than the sum of its proper divisors (251430773868).

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

188172225492 is a wasteful number, since it uses less digits than its factorization.

188172225492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7640 (or 7638 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 51.

The spelling of 188172225492 in words is "one hundred eighty-eight billion, one hundred seventy-two million, two hundred twenty-five thousand, four hundred ninety-two".