165591523328 has 224 divisors, whose sum is σ = 418230466560. Its totient is φ = 63680348160.

The previous prime is 165591523319. The next prime is 165591523369. The reversal of 165591523328 is 823325195561.

It is a tau number, because it is divible by the number of its divisors (224).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49830275 + ... + 49833597.

Almost surely, 2^165591523328 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 165591523328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209115233280).

165591523328 is an abundant number, since it is smaller than the sum of its proper divisors (252638943232).

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

165591523328 is an equidigital number, since it uses as much as digits as its factorization.

165591523328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3446 (or 3422 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 50.

The spelling of 165591523328 in words is "one hundred sixty-five billion, five hundred ninety-one million, five hundred twenty-three thousand, three hundred twenty-eight".