987653
The greatest 4-digit number with no repeated digits is... 9876
987,654
98765
9876543
98,764
The greatest 4-digit number with no repeated digits is... 9876
98,764
9876543.
987654
98,764
9876543
987,654
98765
98,764
94205 if digits are not to be repeated and 99999 if digits can be repeated
The largest ten digit number with no repeated digits is '9876543210'.
It is 9998, or if the digits can't be repeated, it is 9876.