I mean how many 25 lb bags should I have stock piled?
4?
10?
Rice does last forever if stored properly.
Brown rice does not keep well.
White rice does much better.
I suppose that how much you store depends on how much you eat.
FWIW, oats are nutritionally better than white rice and keep very well. IMO, they are a great survival food. One can live on them for years. I know.
BTW, if one lives almost exclusively on oats, the 10# box that you can buy at Sam’s Club lasts about three weeks.
Don’t forget salt and good quality multivitamins.