565561655 has 4 divisors (see below), whose sum is σ = 678673992. Its totient is φ = 452449320.

The previous prime is 565561649. The next prime is 565561663. The reversal of 565561655 is 556165565.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 565561655 - 2¹⁴ = 565545271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56556161 + ... + 56556170.

It is an arithmetic number, because the mean of its divisors is an integer number (169668498).

Almost surely, 2^565561655 is an apocalyptic number.

565561655 is a deficient number, since it is larger than the sum of its proper divisors (113112337).

565561655 is a wasteful number, since it uses less digits than its factorization.

565561655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113112336.

The product of its digits is 675000, while the sum is 44.

The square root of 565561655 is about 23781.5402150492. The cubic root of 565561655 is about 826.9767864126.

The spelling of 565561655 in words is "five hundred sixty-five million, five hundred sixty-one thousand, six hundred fifty-five".