165989376000 has 1344 divisors, whose sum is σ = 714464464896. Its totient is φ = 36274176000.

The previous prime is 165989375999. The next prime is 165989376017. The reversal of 165989376000 is 673989561.

165989376000 is a `hidden beast` number, since 16 + 598 + 9 + 37 + 6 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1999871959 + ... + 1999872041.

It is an arithmetic number, because the mean of its divisors is an integer number (531595584).

Almost surely, 2^165989376000 is an apocalyptic number.

165989376000 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 165989376000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357232232448).

165989376000 is an abundant number, since it is smaller than the sum of its proper divisors (548475088896).

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

165989376000 is an equidigital number, since it uses as much as digits as its factorization.

165989376000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The spelling of 165989376000 in words is "one hundred sixty-five billion, nine hundred eighty-nine million, three hundred seventy-six thousand".