6564919548749 has 2 divisors, whose sum is σ = 6564919548750. Its totient is φ = 6564919548748.

The previous prime is 6564919548689. The next prime is 6564919548751. The reversal of 6564919548749 is 9478459194656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6036637699849 + 528281848900 = 2456957^2 + 726830^2 .

It is a cyclic number.

It is not a de Polignac number, because 6564919548749 - 2¹² = 6564919544653 is a prime.

Together with 6564919548751, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6564919548749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6564919548049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282459774374 + 3282459774375.

It is an arithmetic number, because the mean of its divisors is an integer number (3282459774375).

Almost surely, 2^{6564919548749} is an apocalyptic number.

It is an amenable number.

6564919548749 is a deficient number, since it is larger than the sum of its proper divisors (1).

6564919548749 is an equidigital number, since it uses as much as digits as its factorization.

6564919548749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2351462400, while the sum is 77.

The spelling of 6564919548749 in words is "six trillion, five hundred sixty-four billion, nine hundred nineteen million, five hundred forty-eight thousand, seven hundred forty-nine".