188749069440 has 512 divisors, whose sum is σ = 654033139200. Its totient is φ = 46173388800.

The previous prime is 188749069427. The next prime is 188749069471. The reversal of 188749069440 is 44960947881.

It is a super-2 number, since 2×188749069440² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 110443306 + ... + 110445014.

It is an arithmetic number, because the mean of its divisors is an integer number (1277408475).

Almost surely, 2^188749069440 is an apocalyptic number.

188749069440 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 188749069440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327016569600).

188749069440 is an abundant number, since it is smaller than the sum of its proper divisors (465284069760).

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

188749069440 is a wasteful number, since it uses less digits than its factorization.

188749069440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856 (or 1844 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 60.

The spelling of 188749069440 in words is "one hundred eighty-eight billion, seven hundred forty-nine million, sixty-nine thousand, four hundred forty".