64345864 has 32 divisors (see below), whose sum is σ = 132726240. Its totient is φ = 29243280.

The previous prime is 64345859. The next prime is 64345871. The reversal of 64345864 is 46854346.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7627 + ... + 13669.

It is an arithmetic number, because the mean of its divisors is an integer number (4147695).

Almost surely, 2^64345864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64345864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66363120).

64345864 is an abundant number, since it is smaller than the sum of its proper divisors (68380376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64345864 is a wasteful number, since it uses less digits than its factorization.

64345864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6082 (or 6056 counting only the distinct ones).

The product of its digits is 276480, while the sum is 40.

The square root of 64345864 is about 8021.5873740800. The cubic root of 64345864 is about 400.7192559022.

The spelling of 64345864 in words is "sixty-four million, three hundred forty-five thousand, eight hundred sixty-four".