165240544 has 72 divisors (see below), whose sum is σ = 400755600. Its totient is φ = 66640896.

The previous prime is 165240539. The next prime is 165240577. The reversal of 165240544 is 445042561.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23557 + ... + 29755.

It is an arithmetic number, because the mean of its divisors is an integer number (5566050).

Almost surely, 2^165240544 is an apocalyptic number.

165240544 is a gapful number since it is divisible by the number (14) 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 165240544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200377800).

165240544 is an abundant number, since it is smaller than the sum of its proper divisors (235515056).

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

165240544 is a wasteful number, since it uses less digits than its factorization.

165240544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6240 (or 6225 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 165240544 is about 12854.5923311477. The cubic root of 165240544 is about 548.7470586165.

The spelling of 165240544 in words is "one hundred sixty-five million, two hundred forty thousand, five hundred forty-four".