64863564 has 24 divisors (see below), whose sum is σ = 152033280. Its totient is φ = 21523344.

The previous prime is 64863559. The next prime is 64863577. The reversal of 64863564 is 46536846.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9444 + ... + 14795.

It is an arithmetic number, because the mean of its divisors is an integer number (6334720).

Almost surely, 2^64863564 is an apocalyptic number.

It is an amenable number.

64863564 is an abundant number, since it is smaller than the sum of its proper divisors (87169716).

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

64863564 is a wasteful number, since it uses less digits than its factorization.

64863564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24469 (or 24467 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 64863564 is about 8053.7919019553. The cubic root of 64863564 is about 401.7910599574.

The spelling of 64863564 in words is "sixty-four million, eight hundred sixty-three thousand, five hundred sixty-four".