189321445500 has 192 divisors, whose sum is σ = 602014533120. Its totient is φ = 45850944000.

The previous prime is 189321445499. The next prime is 189321445529. The reversal of 189321445500 is 5544123981.

It is a congruent 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 63 ways as a sum of consecutive naturals, for example, 18623419 + ... + 18633581.

It is an arithmetic number, because the mean of its divisors is an integer number (3135492360).

Almost surely, 2^189321445500 is an apocalyptic number.

189321445500 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 189321445500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301007266560).

189321445500 is an abundant number, since it is smaller than the sum of its proper divisors (412693087620).

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

189321445500 is a wasteful number, since it uses less digits than its factorization.

189321445500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11325 (or 11313 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 189321445500 in words is "one hundred eighty-nine billion, three hundred twenty-one million, four hundred forty-five thousand, five hundred".