9876543210
The largest digits number with only 2 digits alike is 99
987654
1,111,111,111
4
9876543210
The largest digits number with only 2 digits alike is 99
1111111111
It is 10000.If you meant ONLY 2 digits alike, then it is 10023.
98,765
987654
10123456789
10,023,456,789
4
10,023,456,789
1,111,111,111
4