565657056 has 144 divisors (see below), whose sum is σ = 1706140800. Its totient is φ = 177272064.

The previous prime is 565657049. The next prime is 565657097. The reversal of 565657056 is 650756565.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-3 number, since 3×565657056³ (a number of 27 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 913515 + ... + 914133.

It is an arithmetic number, because the mean of its divisors is an integer number (11848200).

Almost surely, 2^565657056 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 565657056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (853070400).

565657056 is an abundant number, since it is smaller than the sum of its proper divisors (1140483744).

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

565657056 is a wasteful number, since it uses less digits than its factorization.

565657056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 45.

The square root of 565657056 is about 23783.5459088842. The cubic root of 565657056 is about 827.0232829504.

The spelling of 565657056 in words is "five hundred sixty-five million, six hundred fifty-seven thousand, fifty-six".