64002865 has 4 divisors (see below), whose sum is σ = 76803444. Its totient is φ = 51202288.

The previous prime is 64002863. The next prime is 64002871. The reversal of 64002865 is 56820046.

64002865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27133681 + 36869184 = 5209^2 + 6072^2 .

It is a cyclic number.

It is not a de Polignac number, because 64002865 - 2¹ = 64002863 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64002863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6400282 + ... + 6400291.

It is an arithmetic number, because the mean of its divisors is an integer number (19200861).

Almost surely, 2^64002865 is an apocalyptic number.

It is an amenable number.

64002865 is a deficient number, since it is larger than the sum of its proper divisors (12800579).

64002865 is a wasteful number, since it uses less digits than its factorization.

64002865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12800578.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 64002865 is about 8000.1790604961. The cubic root of 64002865 is about 400.0059686609.

The spelling of 64002865 in words is "sixty-four million, two thousand, eight hundred sixty-five".