188189252790 has 128 divisors (see below), whose sum is σ = 564015329280. Its totient is φ = 39040790400.

The previous prime is 188189252773. The next prime is 188189252803. The reversal of 188189252790 is 97252981881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1364085 + ... + 1495695.

It is an arithmetic number, because the mean of its divisors is an integer number (4406369760).

Almost surely, 2^188189252790 is an apocalyptic number.

188189252790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 188189252790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282007664640).

188189252790 is an abundant number, since it is smaller than the sum of its proper divisors (375826076490).

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

188189252790 is a wasteful number, since it uses less digits than its factorization.

188189252790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132258.

The product of its (nonzero) digits is 5806080, while the sum is 60.

The spelling of 188189252790 in words is "one hundred eighty-eight billion, one hundred eighty-nine million, two hundred fifty-two thousand, seven hundred ninety".