188401538140 has 48 divisors (see below), whose sum is σ = 418952628864. Its totient is φ = 70921497600.

The previous prime is 188401538119. The next prime is 188401538177. The reversal of 188401538140 is 41835104881.

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, 6575245 + ... + 6603835.

It is an arithmetic number, because the mean of its divisors is an integer number (8728179768).

Almost surely, 2^188401538140 is an apocalyptic number.

188401538140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188401538140 is an abundant number, since it is smaller than the sum of its proper divisors (230551090724).

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

188401538140 is a wasteful number, since it uses less digits than its factorization.

188401538140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47998 (or 47996 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 43.

The spelling of 188401538140 in words is "one hundred eighty-eight billion, four hundred one million, five hundred thirty-eight thousand, one hundred forty".