188172132930 has 48 divisors (see below), whose sum is σ = 514997421120. Its totient is φ = 47538222624.

The previous prime is 188172132919. The next prime is 188172132937. The reversal of 188172132930 is 39231271881.

188172132930 is a `hidden beast` number, since 188 + 172 + 13 + 293 + 0 = 666.

It is a super-3 number, since 3×188172132930³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (188172132937) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55019382 + ... + 55022801.

It is an arithmetic number, because the mean of its divisors is an integer number (10729112940).

Almost surely, 2^188172132930 is an apocalyptic number.

188172132930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188172132930 is an abundant number, since it is smaller than the sum of its proper divisors (326825288190).

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

188172132930 is a wasteful number, since it uses less digits than its factorization.

188172132930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110042215 (or 110042212 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 188172132930 in words is "one hundred eighty-eight billion, one hundred seventy-two million, one hundred thirty-two thousand, nine hundred thirty".