64943568 has 30 divisors (see below), whose sum is σ = 181752194. Its totient is φ = 21647808.

The previous prime is 64943561. The next prime is 64943573. The reversal of 64943568 is 86534946.

64943568 is a `hidden beast` number, since 6 + 49 + 43 + 568 = 666.

It can be written as a sum of positive squares in only one way, i.e., 42928704 + 22014864 = 6552^2 + 4692^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64943561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 225355 + ... + 225642.

Almost surely, 2^64943568 is an apocalyptic number.

It is an amenable number.

64943568 is an abundant number, since it is smaller than the sum of its proper divisors (116808626).

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

64943568 is a wasteful number, since it uses less digits than its factorization.

64943568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451011 (or 451002 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 64943568 is about 8058.7572242871. The cubic root of 64943568 is about 401.9561844278.

The spelling of 64943568 in words is "sixty-four million, nine hundred forty-three thousand, five hundred sixty-eight".