189323895552 has 144 divisors (see below), whose sum is σ = 554551982208. Its totient is φ = 56862883840.

The previous prime is 189323895521. The next prime is 189323895571. The reversal of 189323895552 is 255598323981.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 855463 + ... + 1053785.

It is an arithmetic number, because the mean of its divisors is an integer number (3851055432).

Almost surely, 2^189323895552 is an apocalyptic number.

189323895552 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 189323895552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277275991104).

189323895552 is an abundant number, since it is smaller than the sum of its proper divisors (365228086656).

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

189323895552 is a wasteful number, since it uses less digits than its factorization.

189323895552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198466 (or 198452 counting only the distinct ones).

The product of its digits is 23328000, while the sum is 60.

The spelling of 189323895552 in words is "one hundred eighty-nine billion, three hundred twenty-three million, eight hundred ninety-five thousand, five hundred fifty-two".