How Many Protons and Neutrons Can You Stick Together and Still Be Stable?

Wer were talking about the heaviest possible element you can make in the universe. How many protons and neutruns can you stick together and still be stable? And we're talking about the stability of these things. It has to do it some sort of magic number, right? Dono. Yet, it turns out that certain numbers of protons and neutrons are more stable than other configurations.