563406283981 has 2 divisors, whose sum is σ = 563406283982. Its totient is φ = 563406283980.

The previous prime is 563406283969. The next prime is 563406283987. The reversal of 563406283981 is 189382604365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 478159803081 + 85246480900 = 691491^2 + 291970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-563406283981 is a prime.

It is a super-2 number, since 2×563406283981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (563406283987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281703141990 + 281703141991.

It is an arithmetic number, because the mean of its divisors is an integer number (281703141991).

Almost surely, 2^563406283981 is an apocalyptic number.

It is an amenable number.

563406283981 is a deficient number, since it is larger than the sum of its proper divisors (1).

563406283981 is an equidigital number, since it uses as much as digits as its factorization.

563406283981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 563406283981 in words is "five hundred sixty-three billion, four hundred six million, two hundred eighty-three thousand, nine hundred eighty-one".