565552561 has 24 divisors (see below), whose sum is σ = 689369856. Its totient is φ = 462036960.

The previous prime is 565552553. The next prime is 565552573. The reversal of 565552561 is 165255565.

565552561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 565552561 - 2³ = 565552553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (565552061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98995 + ... + 104551.

It is an arithmetic number, because the mean of its divisors is an integer number (28723744).

Almost surely, 2^565552561 is an apocalyptic number.

It is an amenable number.

565552561 is a deficient number, since it is larger than the sum of its proper divisors (123817295).

565552561 is a wasteful number, since it uses less digits than its factorization.

565552561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5669 (or 5662 counting only the distinct ones).

The product of its digits is 225000, while the sum is 40.

The square root of 565552561 is about 23781.3490155626. The cubic root of 565552561 is about 826.9723539060.

The spelling of 565552561 in words is "five hundred sixty-five million, five hundred fifty-two thousand, five hundred sixty-one".