A natural number is divisible by 4 if and only if the last two digits are divisible by 4.
716 is divisible by 4 since the last two digits (16) are divisible by 4.
717 is NOT divisible by 4 since the last two digits (17) are NOT divisible by 4.
716 123 456 789 098 765 432 112 is divisible by 4 since the last two digits (12) are divisible by 4.
717 123 456 789 098 765 432 109 is NOT divisible by 4 since the last two digits [09 (i.e. 9)] are NOT divisible by 4.