8128668218 has 32 divisors (see below), whose sum is σ = 14129095680. Its totient is φ = 3466344960.

The previous prime is 8128668209. The next prime is 8128668259.

It is a happy number.

8128668218 is nontrivially palindromic in base 10.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82343 + ... + 151781.

It is an arithmetic number, because the mean of its divisors is an integer number (441534240).

Almost surely, 2^8128668218 is an apocalyptic number.

8128668218 is a deficient number, since it is larger than the sum of its proper divisors (6000427462).

8128668218 is a wasteful number, since it uses less digits than its factorization.

8128668218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69782.

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

The square root of 8128668218 is about 90159.1272029627. The cubic root of 8128668218 is about 2010.6653752859.

The spelling of 8128668218 in words is "eight billion, one hundred twenty-eight million, six hundred sixty-eight thousand, two hundred eighteen".