64559656 has 48 divisors (see below), whose sum is σ = 141844500. Its totient is φ = 27465984.

The previous prime is 64559647. The next prime is 64559657. The reversal of 64559656 is 65695546.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63457156 + 1102500 = 7966^2 + 1050^2 .

Its product of digits (972000) is a multiple of the sum of its prime divisors (1215).

It is not an unprimeable number, because it can be changed into a prime (64559657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61020 + ... + 62068.

Almost surely, 2^64559656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64559656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70922250).

64559656 is an abundant number, since it is smaller than the sum of its proper divisors (77284844).

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

64559656 is a wasteful number, since it uses less digits than its factorization.

64559656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226 (or 1215 counting only the distinct ones).

The product of its digits is 972000, while the sum is 46.

The square root of 64559656 is about 8034.9023640614. The cubic root of 64559656 is about 401.1625678167.

The spelling of 64559656 in words is "sixty-four million, five hundred fifty-nine thousand, six hundred fifty-six".