8218172718128 has 20 divisors (see below), whose sum is σ = 15923484616728. Its totient is φ = 4108886365440.

The previous prime is 8218172718127. The next prime is 8218172718169.

8218172718128 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (8218172718127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12160313 + ... + 12818328.

Almost surely, 2^{8218172718128} is an apocalyptic number.

It is an amenable number.

8218172718128 is a deficient number, since it is larger than the sum of its proper divisors (7705311898600).

8218172718128 is a wasteful number, since it uses less digits than its factorization.

8218172718128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24999212 (or 24999206 counting only the distinct ones).

The product of its digits is 1605632, while the sum is 56.

The spelling of 8218172718128 in words is "eight trillion, two hundred eighteen billion, one hundred seventy-two million, seven hundred eighteen thousand, one hundred twenty-eight".