64321568 has 24 divisors (see below), whose sum is σ = 129330432. Its totient is φ = 31475776.

The previous prime is 64321567. The next prime is 64321571. The reversal of 64321568 is 86512346.

It is not an unprimeable number, because it can be changed into a prime (64321567) 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, 19880 + ... + 22887.

It is an arithmetic number, because the mean of its divisors is an integer number (5388768).

Almost surely, 2^64321568 is an apocalyptic number.

It is an amenable number.

64321568 is an abundant number, since it is smaller than the sum of its proper divisors (65008864).

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

64321568 is a wasteful number, since it uses less digits than its factorization.

64321568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42824 (or 42816 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 64321568 is about 8020.0728176245. The cubic root of 64321568 is about 400.6688144282.

It can be divided in two parts, 6432 and 1568, that added together give a cube (8000 = 20³).

The spelling of 64321568 in words is "sixty-four million, three hundred twenty-one thousand, five hundred sixty-eight".