64560515 has 4 divisors (see below), whose sum is σ = 77472624. Its totient is φ = 51648408.

The previous prime is 64560493. The next prime is 64560521. The reversal of 64560515 is 51506546.

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

It is a cyclic number.

It is not a de Polignac number, because 64560515 - 2¹⁰ = 64559491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6456047 + ... + 6456056.

It is an arithmetic number, because the mean of its divisors is an integer number (19368156).

Almost surely, 2^64560515 is an apocalyptic number.

64560515 is a deficient number, since it is larger than the sum of its proper divisors (12912109).

64560515 is a wasteful number, since it uses less digits than its factorization.

64560515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12912108.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 64560515 is about 8034.9558181735. The cubic root of 64560515 is about 401.1643470347.

The spelling of 64560515 in words is "sixty-four million, five hundred sixty thousand, five hundred fifteen".