8563542116209 has 4 divisors (see below), whose sum is σ = 8575758296820. Its totient is φ = 8551325935600.

The previous prime is 8563542116189. The next prime is 8563542116237. The reversal of 8563542116209 is 9026112453658.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3176022979600 + 5387519136609 = 1782140^2 + 2321103^2 .

It is a cyclic number.

It is not a de Polignac number, because 8563542116209 - 2²¹ = 8563540019057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8563542116009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6108089254 + ... + 6108090655.

It is an arithmetic number, because the mean of its divisors is an integer number (2143939574205).

Almost surely, 2^{8563542116209} is an apocalyptic number.

It is an amenable number.

8563542116209 is a deficient number, since it is larger than the sum of its proper divisors (12216180611).

8563542116209 is a wasteful number, since it uses less digits than its factorization.

8563542116209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12216180610.

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 8563542116209 in words is "eight trillion, five hundred sixty-three billion, five hundred forty-two million, one hundred sixteen thousand, two hundred nine".