There is no such number. If there was one, simply add another digit at the end and you will have a larger number.
99996
852
To create the largest number using the digits 5, 3, 1, 4, and 7, arrange them in descending order. The largest number you can form is 75431.
Using those 4 digits 6451 is the largest odd number you can make.
8752
93,998
The largest 5-digit prime number is 99,991
Arranging them in the order 9521 produces the largest number. Using operands, using the exponential function (if available) would create the largest number. [(2 ^5)^9]^1= 35184372088832
3^(4^(5^(6^7)))
The prime factors of 100 are 2 and 5; the largest of these is 5. The largest prime number under 100 is 97.
Let's start with 99999. It is 5 digits and the largest 5 digit number. Now it is odd, so let's find the largest replacement for the last 9 so we can make it even. That would be 8, so we have 99998. Now, let's just put a 3 in the thousands place and we have 93998
The largest 5 digit number is 99999. If this is divided by 11 it leaves a remainder of 9. Therefore the largest 5 digit number divisible by 11 is 99999 - 9 = 99990.