188400000187 has 6 divisors (see below), whose sum is σ = 219159183948. Its totient is φ = 161485714404.

The previous prime is 188400000169. The next prime is 188400000197. The reversal of 188400000187 is 781000004881.

It is not a de Polignac number, because 188400000187 - 2⁷ = 188400000059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188400000137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1922448933 + ... + 1922449030.

It is an arithmetic number, because the mean of its divisors is an integer number (36526530658).

Almost surely, 2^188400000187 is an apocalyptic number.

188400000187 is a deficient number, since it is larger than the sum of its proper divisors (30759183761).

188400000187 is an equidigital number, since it uses as much as digits as its factorization.

188400000187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3844897977 (or 3844897970 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 37.

The spelling of 188400000187 in words is "one hundred eighty-eight billion, four hundred million, one hundred eighty-seven", and thus it is an aban number.