Conversion of binary number 1010101000010111 to hexadecimal number is

Conversion of binary number 1010101000010111 to hexadecimal number is (AA17)₁₆
Now we convert these pairs hexadecimal like
1010 = 1 × 2³ + 0 × 2² + 1 × 2¹ + 0 × 2⁰
         = 8 + 0 + 2 + 0
         = 10
         = A
1010 = 1 × 2³ + 0 × 2² + 1 × 2¹ + 0 × 2⁰
         = 8 + 0 + 2 + 0
         = 10
         = A
0001 = 0 × 2³ + 0 × 2² + 0 × 2¹ + 1 × 2⁰
         = 0 + 0 + 0 + 1
         = 1
0111 = 0 × 2³ + 1 × 2² + 1 × 2¹ + 1 × 2⁰
         = 0 + 4 + 2 + 1
         = 7
So (1010101000010111)₂ = (AA17)₁₆
1010101000010111 binary = (AA17)₁₆ hexadecimal