25^15 = 9.31322575 × 1020
It is the 15th power.
1,000,000,000,000,000
2.078928179
15th April
It is 11 to the 16th power.
815 = 35184372088832
115 = 1
1.0715 = 2.759031541 ----------------------
215 = 3276832768
8 to the 15th power
Power Rangers has viewed anniversaries according to their seasons whether than their actual years which is why Operation Overdrive is the 15th anniversary because it is the 15th season.
10 to the 15th power i think =]