64585915 has 4 divisors (see below), whose sum is σ = 77503104. Its totient is φ = 51668728.

The previous prime is 64585903. The next prime is 64585919. The reversal of 64585915 is 51958546.

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 64585915 - 2¹⁷ = 64454843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64585919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6458587 + ... + 6458596.

It is an arithmetic number, because the mean of its divisors is an integer number (19375776).

Almost surely, 2^64585915 is an apocalyptic number.

64585915 is a deficient number, since it is larger than the sum of its proper divisors (12917189).

64585915 is a wasteful number, since it uses less digits than its factorization.

64585915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12917188.

The product of its digits is 216000, while the sum is 43.

The square root of 64585915 is about 8036.5362563731. The cubic root of 64585915 is about 401.2169500766.

The spelling of 64585915 in words is "sixty-four million, five hundred eighty-five thousand, nine hundred fifteen".