188400000188 has 24 divisors (see below), whose sum is σ = 344295440160. Its totient is φ = 90036080640.

The previous prime is 188400000169. The next prime is 188400000197. The reversal of 188400000188 is 881000004881.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653573 + ... + 896636.

It is an arithmetic number, because the mean of its divisors is an integer number (14345643340).

Almost surely, 2^188400000188 is an apocalyptic number.

It is an amenable number.

188400000188 is a deficient number, since it is larger than the sum of its proper divisors (155895439972).

188400000188 is a wasteful number, since it uses less digits than its factorization.

188400000188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551557 (or 1551555 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 38.

The spelling of 188400000188 in words is "one hundred eighty-eight billion, four hundred million, one hundred eighty-eight", and thus it is an aban number.