561520206014561 has 2 divisors, whose sum is σ = 561520206014562. Its totient is φ = 561520206014560.

The previous prime is 561520206014519. The next prime is 561520206014627. The reversal of 561520206014561 is 165410602025165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 483747296993536 + 77772909021025 = 21994256^2 + 8818895^2 .

It is a cyclic number.

It is not a de Polignac number, because 561520206014561 - 2¹⁰ = 561520206013537 is a prime.

It is a super-3 number, since 3×561520206014561³ (a number of 45 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (561520206014161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280760103007280 + 280760103007281.

It is an arithmetic number, because the mean of its divisors is an integer number (280760103007281).

Almost surely, 2^{561520206014561} is an apocalyptic number.

It is an amenable number.

561520206014561 is a deficient number, since it is larger than the sum of its proper divisors (1).

561520206014561 is an equidigital number, since it uses as much as digits as its factorization.

561520206014561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 561520206014561 in words is "five hundred sixty-one trillion, five hundred twenty billion, two hundred six million, fourteen thousand, five hundred sixty-one".