6564247409 has 2 divisors, whose sum is σ = 6564247410. Its totient is φ = 6564247408.

The previous prime is 6564247399. The next prime is 6564247439. The reversal of 6564247409 is 9047424656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4412679184 + 2151568225 = 66428^2 + 46385^2 .

It is a cyclic number.

It is not a de Polignac number, because 6564247409 - 2¹² = 6564243313 is a prime.

It is not a weakly prime, because it can be changed into another prime (6564247439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282123704 + 3282123705.

It is an arithmetic number, because the mean of its divisors is an integer number (3282123705).

Almost surely, 2^6564247409 is an apocalyptic number.

It is an amenable number.

6564247409 is a deficient number, since it is larger than the sum of its proper divisors (1).

6564247409 is an equidigital number, since it uses as much as digits as its factorization.

6564247409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The square root of 6564247409 is about 81020.0432547404. The cubic root of 6564247409 is about 1872.3842550483.

It can be divided in two parts, 6564247 and 409, that added together give a palindrome (6564656).

The spelling of 6564247409 in words is "six billion, five hundred sixty-four million, two hundred forty-seven thousand, four hundred nine".