64565165 has 16 divisors (see below), whose sum is σ = 91601280. Its totient is φ = 42745920.

The previous prime is 64565161. The next prime is 64565177. The reversal of 64565165 is 56156546.

It is not a de Polignac number, because 64565165 - 2² = 64565161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64565161) 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, 30791 + ... + 32820.

It is an arithmetic number, because the mean of its divisors is an integer number (5725080).

Almost surely, 2^64565165 is an apocalyptic number.

It is an amenable number.

64565165 is a deficient number, since it is larger than the sum of its proper divisors (27036115).

64565165 is a wasteful number, since it uses less digits than its factorization.

64565165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63652.

The product of its digits is 108000, while the sum is 38.

The square root of 64565165 is about 8035.2451736086. The cubic root of 64565165 is about 401.1739781507.

The spelling of 64565165 in words is "sixty-four million, five hundred sixty-five thousand, one hundred sixty-five".