64045865 has 16 divisors (see below), whose sum is σ = 87124800. Its totient is φ = 44805312.

The previous prime is 64045843. The next prime is 64045867. The reversal of 64045865 is 56854046.

It is a cyclic number.

It is not a de Polignac number, because 64045865 - 2⁸ = 64045609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64045867) 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, 24695 + ... + 27164.

It is an arithmetic number, because the mean of its divisors is an integer number (5445300).

Almost surely, 2^64045865 is an apocalyptic number.

64045865 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64045865 is a deficient number, since it is larger than the sum of its proper divisors (23078935).

64045865 is a wasteful number, since it uses less digits than its factorization.

64045865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51896.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 64045865 is about 8002.8660491102. The cubic root of 64045865 is about 400.0955292669.

The spelling of 64045865 in words is "sixty-four million, forty-five thousand, eight hundred sixty-five".