8221609799 has 16 divisors (see below), whose sum is σ = 8941363200. Its totient is φ = 7514695776.

The previous prime is 8221609793. The next prime is 8221609811. The reversal of 8221609799 is 9979061228.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8221609799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8221609799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221609793) 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 in 15 ways as a sum of consecutive naturals, for example, 548762 + ... + 563544.

It is an arithmetic number, because the mean of its divisors is an integer number (558835200).

Almost surely, 2^8221609799 is an apocalyptic number.

8221609799 is a deficient number, since it is larger than the sum of its proper divisors (719753401).

8221609799 is a wasteful number, since it uses less digits than its factorization.

8221609799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15214.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 8221609799 is about 90673.0930265423. The cubic root of 8221609799 is about 2018.2995360714.

The spelling of 8221609799 in words is "eight billion, two hundred twenty-one million, six hundred nine thousand, seven hundred ninety-nine".