8548961809 has 2 divisors, whose sum is σ = 8548961810. Its totient is φ = 8548961808.

The previous prime is 8548961779. The next prime is 8548961831. The reversal of 8548961809 is 9081698458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8522982400 + 25979409 = 92320^2 + 5097^2 .

It is a cyclic number.

It is not a de Polignac number, because 8548961809 - 2²¹ = 8546864657 is a prime.

It is not a weakly prime, because it can be changed into another prime (8548961879) 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, 4274480904 + 4274480905.

It is an arithmetic number, because the mean of its divisors is an integer number (4274480905).

Almost surely, 2^8548961809 is an apocalyptic number.

It is an amenable number.

8548961809 is a deficient number, since it is larger than the sum of its proper divisors (1).

8548961809 is an equidigital number, since it uses as much as digits as its factorization.

8548961809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4976640, while the sum is 58.

The square root of 8548961809 is about 92460.5959801255. The cubic root of 8548961809 is about 2044.7385847578.

The spelling of 8548961809 in words is "eight billion, five hundred forty-eight million, nine hundred sixty-one thousand, eight hundred nine".