565288623059921 has 2 divisors, whose sum is σ = 565288623059922. Its totient is φ = 565288623059920.

The previous prime is 565288623059857. The next prime is 565288623059969. The reversal of 565288623059921 is 129950326882565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399338473737025 + 165950149322896 = 19983455^2 + 12882164^2 .

It is a cyclic number.

It is not a de Polignac number, because 565288623059921 - 2⁶ = 565288623059857 is a prime.

It is a super-2 number, since 2×565288623059921² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (565288623059521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282644311529960 + 282644311529961.

It is an arithmetic number, because the mean of its divisors is an integer number (282644311529961).

Almost surely, 2^{565288623059921} is an apocalyptic number.

It is an amenable number.

565288623059921 is a deficient number, since it is larger than the sum of its proper divisors (1).

565288623059921 is an equidigital number, since it uses as much as digits as its factorization.

565288623059921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872000, while the sum is 71.

The spelling of 565288623059921 in words is "five hundred sixty-five trillion, two hundred eighty-eight billion, six hundred twenty-three million, fifty-nine thousand, nine hundred twenty-one".