564646256 has 40 divisors (see below), whose sum is σ = 1170498000. Its totient is φ = 263070720.

The previous prime is 564646249. The next prime is 564646267. The reversal of 564646256 is 652646465.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3320 + ... + 33768.

It is an arithmetic number, because the mean of its divisors is an integer number (29262450).

Almost surely, 2^564646256 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 564646256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (585249000).

564646256 is an abundant number, since it is smaller than the sum of its proper divisors (605851744).

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

564646256 is a wasteful number, since it uses less digits than its factorization.

564646256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30537 (or 30531 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 44.

The square root of 564646256 is about 23762.2864219755. The cubic root of 564646256 is about 826.5303732409.

The spelling of 564646256 in words is "five hundred sixty-four million, six hundred forty-six thousand, two hundred fifty-six".