64559840 has 24 divisors (see below), whose sum is σ = 152523000. Its totient is φ = 25823872.

The previous prime is 64559839. The next prime is 64559893. The reversal of 64559840 is 4895546.

It is a happy number.

64559840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201590 + ... + 201909.

It is an arithmetic number, because the mean of its divisors is an integer number (6355125).

Almost surely, 2^64559840 is an apocalyptic number.

It is an amenable number.

64559840 is an abundant number, since it is smaller than the sum of its proper divisors (87963160).

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

64559840 is a wasteful number, since it uses less digits than its factorization.

64559840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403514 (or 403506 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 64559840 is about 8034.9138140991. The cubic root of 64559840 is about 401.1629489311.

The spelling of 64559840 in words is "sixty-four million, five hundred fifty-nine thousand, eight hundred forty".