165163265 has 16 divisors (see below), whose sum is σ = 205465680. Its totient is φ = 127303680.

The previous prime is 165163259. The next prime is 165163267. The reversal of 165163265 is 562361561.

It can be written as a sum of positive squares in 8 ways, for example, as 5216656 + 159946609 = 2284^2 + 12647^2 .

It is not a de Polignac number, because 165163265 - 2⁴ = 165163249 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165163267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92057 + ... + 93833.

It is an arithmetic number, because the mean of its divisors is an integer number (12841605).

It is a Poulet number, since it divides 2^165163264-1.

Almost surely, 2^165163265 is an apocalyptic number.

It is an amenable number.

165163265 is a deficient number, since it is larger than the sum of its proper divisors (40302415).

165163265 is a wasteful number, since it uses less digits than its factorization.

165163265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452.

The product of its digits is 32400, while the sum is 35.

The square root of 165163265 is about 12851.5860888841. The cubic root of 165163265 is about 548.6615000413.

The spelling of 165163265 in words is "one hundred sixty-five million, one hundred sixty-three thousand, two hundred sixty-five".