565455211261 has 2 divisors, whose sum is σ = 565455211262. Its totient is φ = 565455211260.

The previous prime is 565455211219. The next prime is 565455211271. The reversal of 565455211261 is 162112554565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424297207161 + 141158004100 = 651381^2 + 375710^2 .

It is a cyclic number.

It is not a de Polignac number, because 565455211261 - 2¹⁵ = 565455178493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (565455211201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282727605630 + 282727605631.

It is an arithmetic number, because the mean of its divisors is an integer number (282727605631).

Almost surely, 2^565455211261 is an apocalyptic number.

It is an amenable number.

565455211261 is a deficient number, since it is larger than the sum of its proper divisors (1).

565455211261 is an equidigital number, since it uses as much as digits as its factorization.

565455211261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360000, while the sum is 43.

The spelling of 565455211261 in words is "five hundred sixty-five billion, four hundred fifty-five million, two hundred eleven thousand, two hundred sixty-one".