6530564561 has 2 divisors, whose sum is σ = 6530564562. Its totient is φ = 6530564560.

The previous prime is 6530564543. The next prime is 6530564611. The reversal of 6530564561 is 1654650356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5364683536 + 1165881025 = 73244^2 + 34145^2 .

It is a cyclic number.

It is not a de Polignac number, because 6530564561 - 2¹⁰ = 6530563537 is a prime.

It is not a weakly prime, because it can be changed into another prime (6530534561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3265282280 + 3265282281.

It is an arithmetic number, because the mean of its divisors is an integer number (3265282281).

Almost surely, 2^6530564561 is an apocalyptic number.

It is an amenable number.

6530564561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6530564561 is an equidigital number, since it uses as much as digits as its factorization.

6530564561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324000, while the sum is 41.

The square root of 6530564561 is about 80811.9085345718. The cubic root of 6530564561 is about 1869.1761993334.

The spelling of 6530564561 in words is "six billion, five hundred thirty million, five hundred sixty-four thousand, five hundred sixty-one".