Exponentiation returning negative value or zero value when should be positive

[Max_Beez]

If I use the exponentiation operator in the terminal for a positive integer to itself, sometimes it returns a negative value or returns zero. Below is two screen shots.

Could someone explain why this could be occurring? Or if there is a fix.

[mbaz]

https://docs.julialang.org/en/v1.7/manual/faq/#faq-integer-arithmetic