The largest number

Find the largest integer such that:

1. No figures is not repeat,
2. multiplication of every two digits is odd,
3. addition all digits is odd.


x =  9753


MAX=9876543210 97=63 75=35 53=15   9+7+5+3=24 MAX = 9876543210 \ \\ 9\cdot 7 = 63 \ \\ 7\cdot 5 = 35 \ \\ 5\cdot 3 = 15 \ \\ \ \\ \ \\ 9+7+5+3 = 24 \ \\

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