Prefix of reversible is "ir" i.e irreversible.

Is there a prefix in reverse?

The Latin prefix re- of irreversible and reverse.

What is the prefix for not reversible?

Which prefix should be added to the word "reversible" so that it means "not reversible"? The prefixes dis- and de- also means "not". They let you know that the new word now has the opposite meaning of the root word.