changeless, unmutable, nonmodifiable, nonimmutable, unmodifiable, nonmutable, fixed, unalterable, nonchangeable, inalterable, more...

mutable, changeable, variable

int, float, bool, str, frozenset, bytes, more...

omnipotent, centre, highest, sole, divine, natural, same, physical

never changing,   not changeable,   cannot be changed,   unable to change,   can't be changed,   never change,   not able to change,   cant be changed,   doesnt change,   cant change