165040144 has 20 divisors (see below), whose sum is σ = 321537580. Its totient is φ = 82062720.

The previous prime is 165040133. The next prime is 165040151. The reversal of 165040144 is 441040561.

It can be written as a sum of positive squares in 2 ways, for example, as 62220544 + 102819600 = 7888^2 + 10140^2 .

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, 25599 + ... + 31390.

It is an arithmetic number, because the mean of its divisors is an integer number (16076879).

Almost surely, 2^165040144 is an apocalyptic number.

It is an amenable number.

165040144 is a deficient number, since it is larger than the sum of its proper divisors (156497436).

165040144 is a wasteful number, since it uses less digits than its factorization.

165040144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57178 (or 57172 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 165040144 is about 12846.7950867133. The cubic root of 165040144 is about 548.5251328635.

The spelling of 165040144 in words is "one hundred sixty-five million, forty thousand, one hundred forty-four".