561573131442497 has 2 divisors, whose sum is σ = 561573131442498. Its totient is φ = 561573131442496.

The previous prime is 561573131442409. The next prime is 561573131442683. The reversal of 561573131442497 is 794244131375165.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331840180023361 + 229732951419136 = 18216481^2 + 15156944^2 .

It is a cyclic number.

It is not a de Polignac number, because 561573131442497 - 2³⁸ = 561298253535553 is a prime.

It is not a weakly prime, because it can be changed into another prime (561573131402497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280786565721248 + 280786565721249.

It is an arithmetic number, because the mean of its divisors is an integer number (280786565721249).

Almost surely, 2^{561573131442497} is an apocalyptic number.

It is an amenable number.

561573131442497 is a deficient number, since it is larger than the sum of its proper divisors (1).

561573131442497 is an equidigital number, since it uses as much as digits as its factorization.

561573131442497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76204800, while the sum is 62.

The spelling of 561573131442497 in words is "five hundred sixty-one trillion, five hundred seventy-three billion, one hundred thirty-one million, four hundred forty-two thousand, four hundred ninety-seven".