6564119909 has 2 divisors, whose sum is σ = 6564119910. Its totient is φ = 6564119908.

The previous prime is 6564119899. The next prime is 6564119921. The reversal of 6564119909 is 9099114656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5982249025 + 581870884 = 77345^2 + 24122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6564119909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6564119959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282059954 + 3282059955.

It is an arithmetic number, because the mean of its divisors is an integer number (3282059955).

Almost surely, 2^6564119909 is an apocalyptic number.

It is an amenable number.

6564119909 is a deficient number, since it is larger than the sum of its proper divisors (1).

6564119909 is an equidigital number, since it uses as much as digits as its factorization.

6564119909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 6564119909 is about 81019.2564085847. The cubic root of 6564119909 is about 1872.3721322807.

The spelling of 6564119909 in words is "six billion, five hundred sixty-four million, one hundred nineteen thousand, nine hundred nine".