565440989231 has 2 divisors, whose sum is σ = 565440989232. Its totient is φ = 565440989230.

The previous prime is 565440989173. The next prime is 565440989233. The reversal of 565440989231 is 132989044565.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 565440989231 - 2¹⁸ = 565440727087 is a prime.

It is a super-2 number, since 2×565440989231² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 565440989233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (565440989233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282720494615 + 282720494616.

It is an arithmetic number, because the mean of its divisors is an integer number (282720494616).

Almost surely, 2^565440989231 is an apocalyptic number.

565440989231 is a deficient number, since it is larger than the sum of its proper divisors (1).

565440989231 is an equidigital number, since it uses as much as digits as its factorization.

565440989231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9331200, while the sum is 56.

The spelling of 565440989231 in words is "five hundred sixty-five billion, four hundred forty million, nine hundred eighty-nine thousand, two hundred thirty-one".