6809041549 has 2 divisors, whose sum is σ = 6809041550. Its totient is φ = 6809041548.

The previous prime is 6809041537. The next prime is 6809041559. The reversal of 6809041549 is 9451409086.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6543677449 + 265364100 = 80893^2 + 16290^2 .

It is a cyclic number.

It is not a de Polignac number, because 6809041549 - 2⁵ = 6809041517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6809041499 and 6809041508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6809041559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3404520774 + 3404520775.

It is an arithmetic number, because the mean of its divisors is an integer number (3404520775).

Almost surely, 2^6809041549 is an apocalyptic number.

It is an amenable number.

6809041549 is a deficient number, since it is larger than the sum of its proper divisors (1).

6809041549 is an equidigital number, since it uses as much as digits as its factorization.

6809041549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 6809041549 is about 82516.9167443864. The cubic root of 6809041549 is about 1895.3757860350.

The spelling of 6809041549 in words is "six billion, eight hundred nine million, forty-one thousand, five hundred forty-nine".