188185486138 has 8 divisors (see below), whose sum is σ = 303991939188. Its totient is φ = 86854839744.

The previous prime is 188185486123. The next prime is 188185486189. The reversal of 188185486138 is 831684581881.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 162414642049 + 25770844089 = 403007^2 + 160533^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3618951631 + ... + 3618951682.

Almost surely, 2^188185486138 is an apocalyptic number.

188185486138 is a deficient number, since it is larger than the sum of its proper divisors (115806453050).

188185486138 is a wasteful number, since it uses less digits than its factorization.

188185486138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7237903328.

The product of its digits is 11796480, while the sum is 61.

The spelling of 188185486138 in words is "one hundred eighty-eight billion, one hundred eighty-five million, four hundred eighty-six thousand, one hundred thirty-eight".