188817864553 has 32 divisors (see below), whose sum is σ = 206338129920. Its totient is φ = 172126321920.

The previous prime is 188817864527. The next prime is 188817864577. The reversal of 188817864553 is 355468718881.

It is not a de Polignac number, because 188817864553 - 2¹³ = 188817856361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188817864523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15782788 + ... + 15794746.

It is an arithmetic number, because the mean of its divisors is an integer number (6448066560).

Almost surely, 2^188817864553 is an apocalyptic number.

It is an amenable number.

188817864553 is a deficient number, since it is larger than the sum of its proper divisors (17520265367).

188817864553 is a wasteful number, since it uses less digits than its factorization.

188817864553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12277.

The product of its digits is 51609600, while the sum is 64.

The spelling of 188817864553 in words is "one hundred eighty-eight billion, eight hundred seventeen million, eight hundred sixty-four thousand, five hundred fifty-three".