64568985 has 24 divisors (see below), whose sum is σ = 111873024. Its totient is φ = 31786560.

The previous prime is 64568971. The next prime is 64569017. The reversal of 64568985 is 58986546.

It is not a de Polignac number, because 64568985 - 2⁴ = 64568969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10201 + ... + 15270.

It is an arithmetic number, because the mean of its divisors is an integer number (4661376).

Almost surely, 2^64568985 is an apocalyptic number.

64568985 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64568985 is a deficient number, since it is larger than the sum of its proper divisors (47304039).

64568985 is a wasteful number, since it uses less digits than its factorization.

64568985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25505 (or 25492 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 51.

The square root of 64568985 is about 8035.4828728584. The cubic root of 64568985 is about 401.1818898184.

The spelling of 64568985 in words is "sixty-four million, five hundred sixty-eight thousand, nine hundred eighty-five".