265915165 has 16 divisors (see below), whose sum is σ = 341406720. Its totient is φ = 198227520.

The previous prime is 265915163. The next prime is 265915193. The reversal of 265915165 is 561519562.

It is not a de Polignac number, because 265915165 - 2¹ = 265915163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265915163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17149 + ... + 28738.

It is an arithmetic number, because the mean of its divisors is an integer number (21337920).

Almost surely, 2^265915165 is an apocalyptic number.

It is an amenable number.

265915165 is a deficient number, since it is larger than the sum of its proper divisors (75491555).

265915165 is a wasteful number, since it uses less digits than its factorization.

265915165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45972.

The product of its digits is 81000, while the sum is 40.

The square root of 265915165 is about 16306.9054391077. The cubic root of 265915165 is about 643.0543817940.

The spelling of 265915165 in words is "two hundred sixty-five million, nine hundred fifteen thousand, one hundred sixty-five".