165111144 has 64 divisors (see below), whose sum is σ = 451975680. Its totient is φ = 49848000.

The previous prime is 165111143. The next prime is 165111173. The reversal of 165111144 is 441111561.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (165111143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81099 + ... + 83109.

It is an arithmetic number, because the mean of its divisors is an integer number (7062120).

Almost surely, 2^165111144 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 165111144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225987840).

165111144 is an abundant number, since it is smaller than the sum of its proper divisors (286864536).

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

165111144 is a wasteful number, since it uses less digits than its factorization.

165111144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342 (or 2338 counting only the distinct ones).

The product of its digits is 480, while the sum is 24.

The square root of 165111144 is about 12849.5581246983. The cubic root of 165111144 is about 548.6037797916.

The spelling of 165111144 in words is "one hundred sixty-five million, one hundred eleven thousand, one hundred forty-four".