188950081536 has 468 divisors, whose sum is σ = 580374943200. Its totient is φ = 61487382528.

The previous prime is 188950081511. The next prime is 188950081571. The reversal of 188950081536 is 635180059881.

188950081536 is a `hidden beast` number, since 1 + 8 + 8 + 9 + 500 + 81 + 53 + 6 = 666.

It is a super-2 number, since 2×188950081536² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2123034580 + ... + 2123034668.

It is an arithmetic number, because the mean of its divisors is an integer number (1240117400).

Almost surely, 2^188950081536 is an apocalyptic number.

188950081536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 188950081536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290187471600).

188950081536 is an abundant number, since it is smaller than the sum of its proper divisors (391424861664).

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

188950081536 is an frugal number, since it uses more digits than its factorization.

188950081536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 54.

The spelling of 188950081536 in words is "one hundred eighty-eight billion, nine hundred fifty million, eighty-one thousand, five hundred thirty-six".