165544825 has 12 divisors (see below), whose sum is σ = 205447788. Its totient is φ = 132324800.

The previous prime is 165544817. The next prime is 165544837. The reversal of 165544825 is 528445561.

It can be written as a sum of positive squares in 6 ways, for example, as 602176 + 164942649 = 776^2 + 12843^2 .

It is not a de Polignac number, because 165544825 - 2³ = 165544817 is a prime.

It is a Duffinian 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, 41415 + ... + 45235.

It is an arithmetic number, because the mean of its divisors is an integer number (17120649).

Almost surely, 2^165544825 is an apocalyptic number.

It is an amenable number.

165544825 is a deficient number, since it is larger than the sum of its proper divisors (39902963).

165544825 is a wasteful number, since it uses less digits than its factorization.

165544825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5564 (or 5559 counting only the distinct ones).

The product of its digits is 192000, while the sum is 40.

The square root of 165544825 is about 12866.4223854186. The cubic root of 165544825 is about 549.0836808397.

The spelling of 165544825 in words is "one hundred sixty-five million, five hundred forty-four thousand, eight hundred twenty-five".