What are Apocalypse’s powers?

The entire marketing campaign for X-Men: Apocalypse is built on Apocalypse himself, the greatest enemy the X-Men have encountered until now, the mutant who has all the powers in the world. And so the fans expect to see a multifaceted villain, one that would rival Magneto in complexity.
It wasn’t really so, though, as Apocalypse has a pretty basic plan, which falls along the lines of Sebastian Shaw’s schemes – to kill all humans and leave the Earth only for the mutants. The twist is that Apocalypse has no problems in killing the lesser mutants (the death of Archangel says it all). However, unlike Shaw’s powers, I have no idea what this Apocalypse can actually do.
The X-Men Cinematic Universe is built on the idea that genetic mutations are the basis of the mutants’ existence – in other words, it’s easy to understand how each of the powers work. However, how does Apocalypse’s work, when he is not bound to one single body? How does he manage to steal, as an energy entity, and store all of those powers, if he doesn’t have a body of his own?
Furthermore, what is the extent of his powers? To be honest, other than matter manipulation at a molecular level, Apocalypse is pretty basic in his skills. That would count the world in the comics – however, this is something else. And when you are called Apocalypse and some guy Magneto does all the apocalyptic things for you…
