64002065 has 8 divisors (see below), whose sum is σ = 77139240. Its totient is φ = 50977152.

The previous prime is 64002061. The next prime is 64002067. The reversal of 64002065 is 56020046.

It can be written as a sum of positive squares in 4 ways, for example, as 21086464 + 42915601 = 4592^2 + 6551^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64002065 - 2² = 64002061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64002065.

It is not an unprimeable number, because it can be changed into a prime (64002061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26804 + ... + 29093.

It is an arithmetic number, because the mean of its divisors is an integer number (9642405).

Almost surely, 2^64002065 is an apocalyptic number.

It is an amenable number.

64002065 is a deficient number, since it is larger than the sum of its proper divisors (13137175).

64002065 is a wasteful number, since it uses less digits than its factorization.

64002065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56131.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 64002065 is about 8000.1290614589. The cubic root of 64002065 is about 400.0043020371.

The spelling of 64002065 in words is "sixty-four million, two thousand, sixty-five".