165725448 has 96 divisors (see below), whose sum is σ = 507391200. Its totient is φ = 44851968.

The previous prime is 165725393. The next prime is 165725449. The reversal of 165725448 is 844527561.

It is a happy number.

It is a super-2 number, since 2×165725448² = 54929848229601408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (165725449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18636 + ... + 26052.

It is an arithmetic number, because the mean of its divisors is an integer number (5285325).

Almost surely, 2^165725448 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 165725448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253695600).

165725448 is an abundant number, since it is smaller than the sum of its proper divisors (341665752).

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

165725448 is a wasteful number, since it uses less digits than its factorization.

165725448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7459 (or 7448 counting only the distinct ones).

The product of its digits is 268800, while the sum is 42.

The square root of 165725448 is about 12873.4396336022. The cubic root of 165725448 is about 549.2833067183.

The spelling of 165725448 in words is "one hundred sixty-five million, seven hundred twenty-five thousand, four hundred forty-eight".