Failing Edge Test Case 6

My Edge test case 6 is failing, I tried many things but still unable to resolve the error. Any hints?

Check for 2^50 - 1.

When I am checking for the input 2^50 - 1, it’s giving the output.

1688849860263935
No Number

it’s correct or wrong.

Yes, that’s correct. Check for this. 72057594037927935

Output should be

108086391056891903
No Number

Closing this topic as your issue is resolved by the mentor. If it is still not resolved, Kindly un-mark the accepted solution or create a new topic and post this question as a reference link in the description of the new topic.