2808098561 has 2 divisors, whose sum is σ = 2808098562. Its totient is φ = 2808098560.

The previous prime is 2808098467. The next prime is 2808098563. The reversal of 2808098561 is 1658908082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2139617536 + 668481025 = 46256^2 + 25855^2 .

It is a cyclic number.

It is not a de Polignac number, because 2808098561 - 2¹⁸ = 2807836417 is a prime.

It is a Sophie Germain prime.

Together with 2808098563, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2808098563) 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, 1404049280 + 1404049281.

It is an arithmetic number, because the mean of its divisors is an integer number (1404049281).

Almost surely, 2^2808098561 is an apocalyptic number.

It is an amenable number.

2808098561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2808098561 is an equidigital number, since it uses as much as digits as its factorization.

2808098561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 47.

The square root of 2808098561 is about 52991.4951761129. The cubic root of 2808098561 is about 1410.8173188423.

The spelling of 2808098561 in words is "two billion, eight hundred eight million, ninety-eight thousand, five hundred sixty-one".