Yottinamus

Yottinamus is equal to \(f_{\psi(\upsilon[10^{24}])}(10)\). The term was coined by Denis Maksudov

Etymology
The 3 parts of the name, "yotto", "in" and "amus", mean \(1\ \text{septillion}\), the "in-" operation. So the full name indicates the ordinal index of the number.