188906788889 has 16 divisors (see below), whose sum is σ = 232517776512. Its totient is φ = 149453710848.

The previous prime is 188906788871. The next prime is 188906788897. The reversal of 188906788889 is 988887609881.

It is a happy number.

It is not a de Polignac number, because 188906788889 - 2¹² = 188906784793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (188906787889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1302782 + ... + 1440504.

It is an arithmetic number, because the mean of its divisors is an integer number (14532361032).

Almost surely, 2^188906788889 is an apocalyptic number.

It is an amenable number.

188906788889 is a deficient number, since it is larger than the sum of its proper divisors (43610987623).

188906788889 is a wasteful number, since it uses less digits than its factorization.

188906788889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152816.

The product of its (nonzero) digits is 891813888, while the sum is 80.

The spelling of 188906788889 in words is "one hundred eighty-eight billion, nine hundred six million, seven hundred eighty-eight thousand, eight hundred eighty-nine".