How are some academics able to publish so many papers per year (e.g., 50+ papers per year)? Background: I understand that academics have different styles of working, but in the same field, I would have thought that the outputs of senior academics should be comparable (and according to their extra responsibilities). 

For example, the Editor-in-Chief of Nano Energy (impact factor 12.343) is the director of a research center. Until now in 2017, he has published 69 papers in high-impact journals (all with impact factors higher than 10). Many distinguished professors in the same field publish about 20 papers per year (in a wider range of journals) without executive or editorial responsibilities.

Note that my question is not about this specific person as there are many examples of academics who are publishing far more than is typical for the field.

Questions


How is an academic able to publish so many papers in a given year (e.g., 50+)?
Does this imply the academic is a genius? Or are there other factors at play?
If you look at big names in science, you'll see their name at the end of a ton of papers (in many disciplines like chemistry and biology, standards can be different elsewhere) and this is why: providing the money and the lab space gives "senior authorship". Usually they review the drafts coming out of their labs/collaborations, along with guiding students/postdocs at the idea stages (which is considered worthy of authorship by NIH/NSF and journal standards). People with big labs get to put their name on the end of every paper generated from not only their lab, but from their lab's collaborations and whatever their grants funded. 

Of course, some people are just crazy productive, but it's more likely that someone with tons of papers is getting a lot of them through their large labs.