I have a hard time wrapping my head around it.

Here's one way to wrap your head around the absurdity of it:

Imagine that the entire working population of Nebraska is dedicated to building cars and nothing else.

Are the slave like workers counted in this number, or are they too disposable?

It likely has more robots than them combined, too.

They're much more than a car manufacturer, right? It makes sense. I remember reading that they make nearly every component of the vehicles themselves, doing everything except maybe the tires and the glass. Assuming I'm more or less right about that, I wonder how many of that number is involved in just assembling vehicles.