565601105561 has 2 divisors, whose sum is σ = 565601105562. Its totient is φ = 565601105560.

The previous prime is 565601105519. The next prime is 565601105581. The reversal of 565601105561 is 165501106565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 506488422400 + 59112683161 = 711680^2 + 243131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-565601105561 is a prime.

It is a super-2 number, since 2×565601105561² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (565601105581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282800552780 + 282800552781.

It is an arithmetic number, because the mean of its divisors is an integer number (282800552781).

Almost surely, 2^565601105561 is an apocalyptic number.

It is an amenable number.

565601105561 is a deficient number, since it is larger than the sum of its proper divisors (1).

565601105561 is an equidigital number, since it uses as much as digits as its factorization.

565601105561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 565601105561 in words is "five hundred sixty-five billion, six hundred one million, one hundred five thousand, five hundred sixty-one".