9876543
98765432
987654
98765
9,876,543,210 9876543210
9875.
86420
The number is 9875.
The largest 5-digit number without repeating digits is 98765. This number uses the highest available digits in descending order, ensuring that no digit is repeated. The digits 9, 8, 7, 6, and 5 are all unique and form the highest possible 5-digit combination.
9875
96532
93876
9876543210, without using any mathemeatical operations.