Bet you didn't know that 231 is the number for God did you? I also bet that none of you knew that the Antichrist has his own number and it isn't 666 or 616 (cos that would make him fall under Ceramic and allied technologies or Diseases respectively). Also, just so we're all on the same page: Douglass Adams may or may not have been correct about 42, since that number is currently unassigned as of Edition 16 of the DDC.
Yes, I'm talking about the Dewey Decimal Classification system...again. It amuses me greatly. They have numbers for nigh on anything you can come up with, and if you can't you just build a number for it. For example, the number 393 and its derivatives deals with Death Customs, i.e. burial (393.1, including entombment) and Mourning (393.9, including funerals, suttee, wakes); and then we've got 781, which deals with General principles and musical forms. Go figure.
I wonder if they have a number for Cops wearing leather pants riding bikes...