188253009940 has 48 divisors (see below), whose sum is σ = 408597041664. Its totient is φ = 72780508800.

The previous prime is 188253009821. The next prime is 188253009943. The reversal of 188253009940 is 49900352881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188253009943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303655 + ... + 684625.

It is an arithmetic number, because the mean of its divisors is an integer number (8512438368).

Almost surely, 2^188253009940 is an apocalyptic number.

188253009940 is a gapful number since it is divisible by the number (10) 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 188253009940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204298520832).

188253009940 is an abundant number, since it is smaller than the sum of its proper divisors (220344031724).

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

188253009940 is a wasteful number, since it uses less digits than its factorization.

188253009940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381808 (or 381806 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 188253009940 in words is "one hundred eighty-eight billion, two hundred fifty-three million, nine thousand, nine hundred forty".