How about two very big engines, each has a crank driven prop and two at each side driven by shafts and spur gears, making six props altogether.
The engine casing has to be that big to accommodate the very big landing wheels and undercarriage when retracted rearwards, one of which is already up or not lowered yet. Aircraft undercarriages often retract unevenly, or maybe there was a problem.
The nose wheel presumably retracts into the fuselage, although it does look a bit 'stuck on'.
Another possibility is there are four wheels each side and what looks like a nose wheel is in fact the rear l/h undercarriage, this would explain the size of the engine housings.
The props appear to be still due to the high camera shutter speed.