189449874432 has 1056 divisors, whose sum is σ = 727628912640. Its totient is φ = 48213688320.

The previous prime is 189449874421. The next prime is 189449874451. The reversal of 189449874432 is 234478944981.

189449874432 is a `hidden beast` number, since 1 + 8 + 9 + 44 + 98 + 74 + 432 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 189449874432.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 545964883 + ... + 545965229.

Almost surely, 2^189449874432 is an apocalyptic number.

189449874432 is a gapful number since it is divisible by the number (12) 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 189449874432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363814456320).

189449874432 is an abundant number, since it is smaller than the sum of its proper divisors (538179038208).

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

189449874432 is a wasteful number, since it uses less digits than its factorization.

189449874432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 403 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 63.

The spelling of 189449874432 in words is "one hundred eighty-nine billion, four hundred forty-nine million, eight hundred seventy-four thousand, four hundred thirty-two".