561346215817 has 2 divisors, whose sum is σ = 561346215818. Its totient is φ = 561346215816.

The previous prime is 561346215811. The next prime is 561346215821. The reversal of 561346215817 is 718512643165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 469692286281 + 91653929536 = 685341^2 + 302744^2 .

It is a cyclic number.

It is not a de Polignac number, because 561346215817 - 2¹⁵ = 561346183049 is a prime.

It is not a weakly prime, because it can be changed into another prime (561346215811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280673107908 + 280673107909.

It is an arithmetic number, because the mean of its divisors is an integer number (280673107909).

Almost surely, 2^561346215817 is an apocalyptic number.

It is an amenable number.

561346215817 is a deficient number, since it is larger than the sum of its proper divisors (1).

561346215817 is an equidigital number, since it uses as much as digits as its factorization.

561346215817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 49.

The spelling of 561346215817 in words is "five hundred sixty-one billion, three hundred forty-six million, two hundred fifteen thousand, eight hundred seventeen".