563821674821 has 2 divisors, whose sum is σ = 563821674822. Its totient is φ = 563821674820.

The previous prime is 563821674799. The next prime is 563821674827. The reversal of 563821674821 is 128476128365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 406878136900 + 156943537921 = 637870^2 + 396161^2 .

It is a cyclic number.

It is not a de Polignac number, because 563821674821 - 2¹⁸ = 563821412677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (563821674827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281910837410 + 281910837411.

It is an arithmetic number, because the mean of its divisors is an integer number (281910837411).

Almost surely, 2^563821674821 is an apocalyptic number.

It is an amenable number.

563821674821 is a deficient number, since it is larger than the sum of its proper divisors (1).

563821674821 is an equidigital number, since it uses as much as digits as its factorization.

563821674821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 53.

The spelling of 563821674821 in words is "five hundred sixty-three billion, eight hundred twenty-one million, six hundred seventy-four thousand, eight hundred twenty-one".