The greatest calculus book ever written is Calculus (4th ed.) by Michael Spivak (link at the bottom). It's really more of an introductory analysis text, because throughout the entire book you're working towards a completely rigorous definition of the real numbers. Some of the exercises are quite challenging, and none are trivial, but give you a truly deep understanding of the material. If you want to truly understand
Calculus, and be able to build it up from some bare axioms by yourself, then this is the book for you. It will be a time consuming process, however.
If you want a quick and dirty approach to Calculus, i.e. just learning how to do Calculus because you don't mind not fully understanding, then I'd recommend using either Stewart's calculus or Spivak's Hitchikers Guide to Calculus (again links are at the bottom).
For number systems, the internet has some pretty good explanations. Again, it really depends on what kind of approach you want to take. You could do a very rigorous number-theoretic approach, but I'm assuming you don't want that, and in that case the internet has good explanations. If you prefer the former, however, let me know and I could send you some links.
For stats, it really depends on how much you want and how deeply you want to understand it again. This book is supposed to be pretty easy to follow, though I haven't read it myself: http://www.amazon.com/Statistics-Third-Edition-David-Freedman/dp/0393970833
Spivak's Calculus: http://www.amazon.com/Calculus-4th-Michael-Spivak/dp/0914098918/ref=sr_1_1?ie=UTF8&qid=1382651863&sr=8-1&keywords=spivak+calculus
Stewart's Calculus (there are a lot of versions) :http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Daps&field-keywords=stewart%20calculus&sprefix=stewa%2Caps&rh=i%3Aaps%2Ck%3Astewart%20calculus
Spivak's less "quick n' dirty" Calculus: http://www.amazon.com/Hitchhikers-Guide-Calculus-Michael-Spivak/dp/0883858126/ref=sr_1_1?ie=UTF8&qid=1382652929&sr=8-1&keywords=hitchiker%27s+guide+to+calculus