165255552 has 448 divisors, whose sum is σ = 642159360. Its totient is φ = 41057280.

The previous prime is 165255547. The next prime is 165255593. The reversal of 165255552 is 255552561.

165255552 is a `hidden beast` number, since 1 + 6 + 52 + 55 + 552 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 7185013 + ... + 7185035.

Almost surely, 2^165255552 is an apocalyptic number.

165255552 is a gapful number since it is divisible by the number (12) 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 165255552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321079680).

165255552 is an abundant number, since it is smaller than the sum of its proper divisors (476903808).

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

165255552 is an equidigital number, since it uses as much as digits as its factorization.

165255552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 46 counting only the distinct ones).

The product of its digits is 75000, while the sum is 36.

The square root of 165255552 is about 12855.1760781407. The cubic root of 165255552 is about 548.7636714613.

The spelling of 165255552 in words is "one hundred sixty-five million, two hundred fifty-five thousand, five hundred fifty-two".