188926209772 has 12 divisors (see below), whose sum is σ = 335277499536. Its totient is φ = 93132638480.

The previous prime is 188926209757. The next prime is 188926209799. The reversal of 188926209772 is 277902629881.

It is a super-2 number, since 2×188926209772² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 188926209772.

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 3 ways as a sum of consecutive naturals, for example, 332616283 + ... + 332616850.

It is an arithmetic number, because the mean of its divisors is an integer number (27939791628).

Almost surely, 2^188926209772 is an apocalyptic number.

It is an amenable number.

188926209772 is a deficient number, since it is larger than the sum of its proper divisors (146351289764).

188926209772 is a wasteful number, since it uses less digits than its factorization.

188926209772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665233208 (or 665233206 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 61.

The spelling of 188926209772 in words is "one hundred eighty-eight billion, nine hundred twenty-six million, two hundred nine thousand, seven hundred seventy-two".