165537144 has 48 divisors (see below), whose sum is σ = 449345520. Its totient is φ = 55054080.

The previous prime is 165537121. The next prime is 165537157. The reversal of 165537144 is 441735561.

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

It is a junction number, because it is equal to n+sod(n) for n = 165537099 and 165537108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32704 + ... + 37424.

It is an arithmetic number, because the mean of its divisors is an integer number (9361365).

Almost surely, 2^165537144 is an apocalyptic number.

It is an amenable number.

165537144 is an abundant number, since it is smaller than the sum of its proper divisors (283808376).

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

165537144 is a wasteful number, since it uses less digits than its factorization.

165537144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5220 (or 5213 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 165537144 is about 12866.1238918332. The cubic root of 165537144 is about 549.0751885236.

The spelling of 165537144 in words is "one hundred sixty-five million, five hundred thirty-seven thousand, one hundred forty-four".