64218568 has 16 divisors (see below), whose sum is σ = 120825180. Its totient is φ = 31998528.

The previous prime is 64218541. The next prime is 64218589. The reversal of 64218568 is 86581246.

It can be written as a sum of positive squares in 2 ways, for example, as 55086084 + 9132484 = 7422^2 + 3022^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64218568.

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, 11355 + ... + 16042.

Almost surely, 2^64218568 is an apocalyptic number.

It is an amenable number.

64218568 is a deficient number, since it is larger than the sum of its proper divisors (56606612).

64218568 is a wasteful number, since it uses less digits than its factorization.

64218568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27696 (or 27692 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 64218568 is about 8013.6488567943. The cubic root of 64218568 is about 400.4548326222.

The spelling of 64218568 in words is "sixty-four million, two hundred eighteen thousand, five hundred sixty-eight".