99
Another Answer:-
99 = 387420489
If the digits are only used once, each, the largest possible number would be 97,531
The largest digits number with only 2 digits alike is 99
The largest even number less than 400,000,000 that can be formed using the digits 1 through 9 only once is 398,765,412. This number uses each of the digits from 1 to 9 exactly once and ends with the digit 2, making it even. Other combinations either exceed 400,000,000 or do not use all the digits exactly once.
This number is 9 999.Or maybe 9999 .
999
If the digits are only used once, each, the largest possible number would be 97,531
The largest digits number with only 2 digits alike is 99
99 is the largest two digit number. If I can use the digits anyway I want, then 9 to the 9th power is larger
Any number you want that doesn‘t have 2, 4, 6, 8, 0.
22412
It looks like you're asking what is the largest 4-digit number which has four 4's for digits - with a four digit number using four 4's, there is only one such number: 4444. Maybe I'm not understanding the wording of your question.
99.99
This number is 9 999.Or maybe 9999 .
I suspect that it is 6^940 which is 731 digits long. The largest through reordering the digits is only 9640.
999,987,654
99,998,765
9987654321