64565265 has 16 divisors (see below), whose sum is σ = 103406400. Its totient is φ = 34400832.

The previous prime is 64565261. The next prime is 64565273. The reversal of 64565265 is 56256546.

It is a happy number.

It is not a de Polignac number, because 64565265 - 2² = 64565261 is a prime.

It is a super-3 number, since 3×64565265³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (64565261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23746 + ... + 26324.

It is an arithmetic number, because the mean of its divisors is an integer number (6462900).

Almost surely, 2^64565265 is an apocalyptic number.

It is an amenable number.

64565265 is a deficient number, since it is larger than the sum of its proper divisors (38841135).

64565265 is a wasteful number, since it uses less digits than its factorization.

64565265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256.

The product of its digits is 216000, while the sum is 39.

The square root of 64565265 is about 8035.2513961917. The cubic root of 64565265 is about 401.1741852664.

The spelling of 64565265 in words is "sixty-four million, five hundred sixty-five thousand, two hundred sixty-five".