561701072209 has 2 divisors, whose sum is σ = 561701072210. Its totient is φ = 561701072208.

The previous prime is 561701072203. The next prime is 561701072279. The reversal of 561701072209 is 902270107165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 453867647809 + 107833424400 = 673697^2 + 328380^2 .

It is a cyclic number.

It is not a de Polignac number, because 561701072209 - 2³ = 561701072201 is a prime.

It is not a weakly prime, because it can be changed into another prime (561701072201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280850536104 + 280850536105.

It is an arithmetic number, because the mean of its divisors is an integer number (280850536105).

Almost surely, 2^561701072209 is an apocalyptic number.

It is an amenable number.

561701072209 is a deficient number, since it is larger than the sum of its proper divisors (1).

561701072209 is an equidigital number, since it uses as much as digits as its factorization.

561701072209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 40.

The spelling of 561701072209 in words is "five hundred sixty-one billion, seven hundred one million, seventy-two thousand, two hundred nine".