A family of Microsoft word processing software products for creating web, email, and print documents.
In Word 2013, you can tell if you have 32 or 64 bit by clicking File tab | Account | About Word.
Note that 64 bit Windows can run either 64 or 32 bit Office, while 32 bit Windows only can run 32 bit Office. Microsoft recommends 32 bit Office for most users; see https://support.office.com/en-us/article/Choose-the-32-bit-or-64-bit-version-of-Office-2dee7807-8f95-4d0c-b5fe-6c6f49b8d261?ui=en-US&rs=en-US&ad=US (Choose the 32-bit or 64-bit version of Office).