8681221868 has 24 divisors (see below), whose sum is σ = 16632244944. Its totient is φ = 3931961600.

The previous prime is 8681221849. The next prime is 8681221873.

It is a happy number.

8681221868 is nontrivially palindromic in base 10.

8681221868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×8681221868² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338705 + ... + 363432.

It is an arithmetic number, because the mean of its divisors is an integer number (693010206).

Almost surely, 2^8681221868 is an apocalyptic number.

It is an amenable number.

8681221868 is a deficient number, since it is larger than the sum of its proper divisors (7951023076).

8681221868 is a wasteful number, since it uses less digits than its factorization.

8681221868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702433 (or 702431 counting only the distinct ones).

The product of its digits is 589824, while the sum is 50.

The square root of 8681221868 is about 93173.0748016829. The cubic root of 8681221868 is about 2055.2293118328.

The spelling of 8681221868 in words is "eight billion, six hundred eighty-one million, two hundred twenty-one thousand, eight hundred sixty-eight".