64895865 has 32 divisors (see below), whose sum is σ = 108834816. Its totient is φ = 32978880.

The previous prime is 64895843. The next prime is 64895867. The reversal of 64895865 is 56859846.

It is not a de Polignac number, because 64895865 - 2⁶ = 64895801 is a prime.

It is a super-2 number, since 2×64895865² = 8422946588196450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64895867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30114 + ... + 32196.

It is an arithmetic number, because the mean of its divisors is an integer number (3401088).

Almost surely, 2^64895865 is an apocalyptic number.

It is an amenable number.

64895865 is a deficient number, since it is larger than the sum of its proper divisors (43938951).

64895865 is a wasteful number, since it uses less digits than its factorization.

64895865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189.

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

The square root of 64895865 is about 8055.7969810566. The cubic root of 64895865 is about 401.8577440273.

The spelling of 64895865 in words is "sixty-four million, eight hundred ninety-five thousand, eight hundred sixty-five".