189797359889920 has 320 divisors, whose sum is σ = 501177994555392. Its totient is φ = 68620271616000.

The previous prime is 189797359889887. The next prime is 189797359889939. The reversal of 189797359889920 is 29988953797981.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176197765 + ... + 177271675.

Almost surely, 2^{189797359889920} is an apocalyptic number.

189797359889920 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 189797359889920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250588997277696).

189797359889920 is an abundant number, since it is smaller than the sum of its proper divisors (311380634665472).

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

189797359889920 is a wasteful number, since it uses less digits than its factorization.

189797359889920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074113 (or 1074097 counting only the distinct ones).

The product of its (nonzero) digits is 44442639360, while the sum is 94.

The spelling of 189797359889920 in words is "one hundred eighty-nine trillion, seven hundred ninety-seven billion, three hundred fifty-nine million, eight hundred eighty-nine thousand, nine hundred twenty".