218728311163 has 16 divisors (see below), whose sum is σ = 237701693440. Its totient is φ = 200502993600.

The previous prime is 218728311157. The next prime is 218728311181. The reversal of 218728311163 is 361113827812.

It is a cyclic number.

It is not a de Polignac number, because 218728311163 - 2⁹ = 218728310651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218728311863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4801831 + ... + 4847167.

It is an arithmetic number, because the mean of its divisors is an integer number (14856355840).

Almost surely, 2^218728311163 is an apocalyptic number.

218728311163 is a deficient number, since it is larger than the sum of its proper divisors (18973382277).

218728311163 is a wasteful number, since it uses less digits than its factorization.

218728311163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53578.

The product of its digits is 96768, while the sum is 43.

The spelling of 218728311163 in words is "two hundred eighteen billion, seven hundred twenty-eight million, three hundred eleven thousand, one hundred sixty-three".