189321605824 has 56 divisors (see below), whose sum is σ = 404895789648. Its totient is φ = 87311846400.

The previous prime is 189321605813. The next prime is 189321605839. The reversal of 189321605824 is 428506123981.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1000374 + ... + 1174474.

It is an arithmetic number, because the mean of its divisors is an integer number (7230281958).

Almost surely, 2^189321605824 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189321605824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202447894824).

189321605824 is an abundant number, since it is smaller than the sum of its proper divisors (215574183824).

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

189321605824 is a wasteful number, since it uses less digits than its factorization.

189321605824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175433 (or 175423 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 189321605824 in words is "one hundred eighty-nine billion, three hundred twenty-one million, six hundred five thousand, eight hundred twenty-four".