6564224647 has 2 divisors, whose sum is σ = 6564224648. Its totient is φ = 6564224646.

The previous prime is 6564224609. The next prime is 6564224659. The reversal of 6564224647 is 7464224656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6564224647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6564224597 and 6564224606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6564224677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282112323 + 3282112324.

It is an arithmetic number, because the mean of its divisors is an integer number (3282112324).

Almost surely, 2^6564224647 is an apocalyptic number.

6564224647 is a deficient number, since it is larger than the sum of its proper divisors (1).

6564224647 is an equidigital number, since it uses as much as digits as its factorization.

6564224647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 46.

The square root of 6564224647 is about 81019.9027832051. The cubic root of 6564224647 is about 1872.3820908368.

Subtracting 6564224647 from its reverse (7464224656), we obtain a palindrome (900000009).

The spelling of 6564224647 in words is "six billion, five hundred sixty-four million, two hundred twenty-four thousand, six hundred forty-seven".