While checking out "正" (as in 正坐, specifically) I found that apparently one of the associated meaning would be 10^40 (i.e. 10 elevated at the 40th power).
Example -taken from Tangorin.com:
sei 【正】 noun / noun with genitive case particle の:
- (logical) true; regular
- original —Abbreviation. → せいほん【正本】
- positive; greater than zero; —Mathematics term. → ふ【負】
10^40 is a pretty large number (estimated number of water molecules on Earth: approx. 4.5x10^48) and I wonder if this is to be intended as "infinite", or if not, when is this specific "meaning" supposed to be used.