165552128 has 56 divisors (see below), whose sum is σ = 378512832. Its totient is φ = 70926336.

The previous prime is 165552113. The next prime is 165552139. The reversal of 165552128 is 821255561.

It is a tau number, because it is divible by the number of its divisors (56).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55901 + ... + 58787.

Almost surely, 2^165552128 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 165552128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189256416).

165552128 is an abundant number, since it is smaller than the sum of its proper divisors (212960704).

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

165552128 is an frugal number, since it uses more digits than its factorization.

165552128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920 (or 2896 counting only the distinct ones).

The product of its digits is 24000, while the sum is 35.

The square root of 165552128 is about 12866.7061830136. The cubic root of 165552128 is about 549.0917549855.

The spelling of 165552128 in words is "one hundred sixty-five million, five hundred fifty-two thousand, one hundred twenty-eight".