6564719449 has 2 divisors, whose sum is σ = 6564719450. Its totient is φ = 6564719448.

The previous prime is 6564719419. The next prime is 6564719489. The reversal of 6564719449 is 9449174656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4755067849 + 1809651600 = 68957^2 + 42540^2 .

It is a cyclic number.

It is not a de Polignac number, because 6564719449 - 2²³ = 6556330841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6564719449.

It is not a weakly prime, because it can be changed into another prime (6564719419) 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, 3282359724 + 3282359725.

It is an arithmetic number, because the mean of its divisors is an integer number (3282359725).

Almost surely, 2^6564719449 is an apocalyptic number.

It is an amenable number.

6564719449 is a deficient number, since it is larger than the sum of its proper divisors (1).

6564719449 is an equidigital number, since it uses as much as digits as its factorization.

6564719449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 55.

The square root of 6564719449 is about 81022.9563086907. The cubic root of 6564719449 is about 1872.4291354956.

The spelling of 6564719449 in words is "six billion, five hundred sixty-four million, seven hundred nineteen thousand, four hundred forty-nine".