: The 64-bit installer is a single package that covers both Acrobat DC and Acrobat Reader DC. If you start with the free Reader, it can be instantly upgraded to the full Pro version upon subscription without a separate reinstallation.
: The core advantage of the 64-bit version is its ability to access much larger address spaces. While 32-bit apps are capped at 2–3 GB of RAM, the 64-bit version can utilize far more, which is critical when working with massive, graphically-rich documents or complex 3D models. 3D PDF Support adobe acrobat pro dc 64 bit exclusive