188106885636 has 12 divisors (see below), whose sum is σ = 438916066512. Its totient is φ = 62702295208.

The previous prime is 188106885607. The next prime is 188106885647. The reversal of 188106885636 is 636588601881.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 188106885636.

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, 7837786890 + ... + 7837786913.

It is an arithmetic number, because the mean of its divisors is an integer number (36576338876).

Almost surely, 2^188106885636 is an apocalyptic number.

It is an amenable number.

188106885636 is an abundant number, since it is smaller than the sum of its proper divisors (250809180876).

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

188106885636 is a wasteful number, since it uses less digits than its factorization.

188106885636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15675573810 (or 15675573808 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 60.

The spelling of 188106885636 in words is "one hundred eighty-eight billion, one hundred six million, eight hundred eighty-five thousand, six hundred thirty-six".