189723988608 has 384 divisors, whose sum is σ = 670325362560. Its totient is φ = 46378844160.

The previous prime is 189723988607. The next prime is 189723988631. The reversal of 189723988608 is 806889327981.

It is a tau number, because it is divible by the number of its divisors (384).

It is not an unprimeable number, because it can be changed into a prime (189723988607) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5512060 + ... + 5546372.

It is an arithmetic number, because the mean of its divisors is an integer number (1745638965).

Almost surely, 2^189723988608 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 189723988608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335162681280).

189723988608 is an abundant number, since it is smaller than the sum of its proper divisors (480601373952).

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

189723988608 is a wasteful number, since it uses less digits than its factorization.

189723988608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34376 (or 34353 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 69.

The spelling of 189723988608 in words is "one hundred eighty-nine billion, seven hundred twenty-three million, nine hundred eighty-eight thousand, six hundred eight".