188638053240 has 128 divisors (see below), whose sum is σ = 696509775360. Its totient is φ = 39800553984.

The previous prime is 188638053223. The next prime is 188638053257. The reversal of 188638053240 is 42350836881.

It is an interprime number because it is at equal distance from previous prime (188638053223) and next prime (188638053257).

It is a self number, because there is not a number n which added to its sum of digits gives 188638053240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8626354 + ... + 8648193.

It is an arithmetic number, because the mean of its divisors is an integer number (5441482620).

Almost surely, 2^188638053240 is an apocalyptic number.

188638053240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188638053240 is an abundant number, since it is smaller than the sum of its proper divisors (507871722120).

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

188638053240 is a wasteful number, since it uses less digits than its factorization.

188638053240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17274581 (or 17274577 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 48.

The spelling of 188638053240 in words is "one hundred eighty-eight billion, six hundred thirty-eight million, fifty-three thousand, two hundred forty".