First, with data like that, you really should be looking at Excel.
Word is the word processor. Excel is the number processor.
You are going to have a very tough time even displaying 50 columns on a Word page, even one 22" wide.

You can select the columns of the table and apply the decimal tab to each column. You could use the format painter or Ctrl+Shift+C and Ctrl+Shift+V.

By the way, there is no advantage to using Word's 64-bit version and there are disadvantages.