561888855304201 has 2 divisors, whose sum is σ = 561888855304202. Its totient is φ = 561888855304200.

The previous prime is 561888855304181. The next prime is 561888855304247. The reversal of 561888855304201 is 102403558888165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 467513478643600 + 94375376660601 = 21622060^2 + 9714699^2 .

It is a cyclic number.

It is not a de Polignac number, because 561888855304201 - 2⁹ = 561888855303689 is a prime.

It is not a weakly prime, because it can be changed into another prime (561888855304291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280944427652100 + 280944427652101.

It is an arithmetic number, because the mean of its divisors is an integer number (280944427652101).

Almost surely, 2^{561888855304201} is an apocalyptic number.

It is an amenable number.

561888855304201 is a deficient number, since it is larger than the sum of its proper divisors (1).

561888855304201 is an equidigital number, since it uses as much as digits as its factorization.

561888855304201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73728000, while the sum is 64.

The spelling of 561888855304201 in words is "five hundred sixty-one trillion, eight hundred eighty-eight billion, eight hundred fifty-five million, three hundred four thousand, two hundred one".