561888855304247 has 2 divisors, whose sum is σ = 561888855304248. Its totient is φ = 561888855304246.

The previous prime is 561888855304201. The next prime is 561888855304289. The reversal of 561888855304247 is 742403558888165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561888855304247 - 2³² = 561884560336951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561888855394247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280944427652123 + 280944427652124.

It is an arithmetic number, because the mean of its divisors is an integer number (280944427652124).

Almost surely, 2^{561888855304247} is an apocalyptic number.

561888855304247 is a deficient number, since it is larger than the sum of its proper divisors (1).

561888855304247 is an equidigital number, since it uses as much as digits as its factorization.

561888855304247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2064384000, while the sum is 74.

The spelling of 561888855304247 in words is "five hundred sixty-one trillion, eight hundred eighty-eight billion, eight hundred fifty-five million, three hundred four thousand, two hundred forty-seven".