987653
The greatest 4-digit number with no repeated digits is... 9876
987,654
9876543
98765
98,764
The greatest 4-digit number with no repeated digits is... 9876
98,764
987,654
9876543
987654
98765
98,764
98,764
9876543.
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'.
The largest number with no repeated digits is 9,876,543,210 although it is 10 digits long, the largest 3 digit number with no repeated digits is 987