565555656 has 64 divisors (see below), whose sum is σ = 1465675200. Its totient is φ = 181709568.

The previous prime is 565555649. The next prime is 565555663. The reversal of 565555656 is 656555565.

It is an interprime number because it is at equal distance from previous prime (565555649) and next prime (565555663).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93871 + ... + 99713.

It is an arithmetic number, because the mean of its divisors is an integer number (22901175).

Almost surely, 2^565555656 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 565555656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (732837600).

565555656 is an abundant number, since it is smaller than the sum of its proper divisors (900119544).

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

565555656 is a wasteful number, since it uses less digits than its factorization.

565555656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5998 (or 5994 counting only the distinct ones).

The product of its digits is 3375000, while the sum is 48.

The square root of 565555656 is about 23781.4140874760. The cubic root of 565555656 is about 826.9738624453.

Subtracting 565555656 from its reverse (656555565), we obtain a palindrome (90999909).

The spelling of 565555656 in words is "five hundred sixty-five million, five hundred fifty-five thousand, six hundred fifty-six".