563573687921 has 2 divisors, whose sum is σ = 563573687922. Its totient is φ = 563573687920.

The previous prime is 563573687891. The next prime is 563573688001. The reversal of 563573687921 is 129786375365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 498844151521 + 64729536400 = 706289^2 + 254420^2 .

It is a cyclic number.

It is not a de Polignac number, because 563573687921 - 2¹⁴ = 563573671537 is a prime.

It is not a weakly prime, because it can be changed into another prime (563573680921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281786843960 + 281786843961.

It is an arithmetic number, because the mean of its divisors is an integer number (281786843961).

Almost surely, 2^563573687921 is an apocalyptic number.

It is an amenable number.

563573687921 is a deficient number, since it is larger than the sum of its proper divisors (1).

563573687921 is an equidigital number, since it uses as much as digits as its factorization.

563573687921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57153600, while the sum is 62.

The spelling of 563573687921 in words is "five hundred sixty-three billion, five hundred seventy-three million, six hundred eighty-seven thousand, nine hundred twenty-one".