64569936 has 20 divisors (see below), whose sum is σ = 166805792. Its totient is φ = 21523296.

The previous prime is 64569929. The next prime is 64569941. The reversal of 64569936 is 63996546.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 1345207 = 64569936 / (6 + 4 + 5 + 6 + 9 + 9 + 3 + 6).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672556 + ... + 672651.

Almost surely, 2^64569936 is an apocalyptic number.

It is an amenable number.

64569936 is an abundant number, since it is smaller than the sum of its proper divisors (102235856).

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

64569936 is a wasteful number, since it uses less digits than its factorization.

64569936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345218 (or 1345212 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 48.

The square root of 64569936 is about 8035.5420476779. The cubic root of 64569936 is about 401.1838594023.

The spelling of 64569936 in words is "sixty-four million, five hundred sixty-nine thousand, nine hundred thirty-six".