188819489899 has 4 divisors (see below), whose sum is σ = 190306257664. Its totient is φ = 187332722136.

The previous prime is 188819489827. The next prime is 188819489921. The reversal of 188819489899 is 998984918881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 188819489899 - 2²⁵ = 188785935467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188819489819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 743383692 + ... + 743383945.

It is an arithmetic number, because the mean of its divisors is an integer number (47576564416).

Almost surely, 2^188819489899 is an apocalyptic number.

188819489899 is a deficient number, since it is larger than the sum of its proper divisors (1486767765).

188819489899 is a wasteful number, since it uses less digits than its factorization.

188819489899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486767764.

The product of its digits is 859963392, while the sum is 82.

The spelling of 188819489899 in words is "one hundred eighty-eight billion, eight hundred nineteen million, four hundred eighty-nine thousand, eight hundred ninety-nine".