165019716 has 27 divisors (see below), whose sum is σ = 417328093. Its totient is φ = 54980880.

The previous prime is 165019709. The next prime is 165019781. The reversal of 165019716 is 617910561.

It is a happy number.

The square root of 165019716 is 12846.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 157402116 + 7617600 = 12546^2 + 2760^2 .

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 76006 + ... + 78146.

Almost surely, 2^165019716 is an apocalyptic number.

165019716 is the 12846-th square number.

It is an amenable number.

165019716 is an abundant number, since it is smaller than the sum of its proper divisors (252308377).

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

165019716 is an equidigital number, since it uses as much as digits as its factorization.

165019716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292 (or 2146 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The cubic root of 165019716 is about 548.5025005239.

Multiplying 165019716 by its sum of digits (36), we get a square (5940709776 = 77076²).

165019716 divided by its sum of digits (36) gives a square (4583881 = 2141²).

The spelling of 165019716 in words is "one hundred sixty-five million, nineteen thousand, seven hundred sixteen".