Petinimah

Petinimah is equal to \(f_{\psi(\tau[10^{15}])}(10)\). The term was coined by Denis Maksudov.

Etymology
The 3 parts of the name, "peto", "in" and "imah", mean \(10^{15}\), the "in-" operation. So the full name indicates the ordinal index of the number.