563687949524221 has 2 divisors, whose sum is σ = 563687949524222. Its totient is φ = 563687949524220.

The previous prime is 563687949524207. The next prime is 563687949524333. The reversal of 563687949524221 is 122425949786365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 552725460292996 + 10962489231225 = 23510114^2 + 3310965^2 .

It is a cyclic number.

It is not a de Polignac number, because 563687949524221 - 2³¹ = 563685802040573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (563687949534221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281843974762110 + 281843974762111.

It is an arithmetic number, because the mean of its divisors is an integer number (281843974762111).

Almost surely, 2^{563687949524221} is an apocalyptic number.

It is an amenable number.

563687949524221 is a deficient number, since it is larger than the sum of its proper divisors (1).

563687949524221 is an equidigital number, since it uses as much as digits as its factorization.

563687949524221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1567641600, while the sum is 73.

The spelling of 563687949524221 in words is "five hundred sixty-three trillion, six hundred eighty-seven billion, nine hundred forty-nine million, five hundred twenty-four thousand, two hundred twenty-one".