188236538688 has 112 divisors (see below), whose sum is σ = 543592877760. Its totient is φ = 57012633600.

The previous prime is 188236538653. The next prime is 188236538713. The reversal of 188236538688 is 886835632881.

It is a happy number.

It is a super-2 number, since 2×188236538688² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4373658 + ... + 4416486.

Almost surely, 2^188236538688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 188236538688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271796438880).

188236538688 is an abundant number, since it is smaller than the sum of its proper divisors (355356339072).

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

188236538688 is a wasteful number, since it uses less digits than its factorization.

188236538688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44936 (or 44926 counting only the distinct ones).

The product of its digits is 106168320, while the sum is 66.

The spelling of 188236538688 in words is "one hundred eighty-eight billion, two hundred thirty-six million, five hundred thirty-eight thousand, six hundred eighty-eight".