Toggle all the bits in the binary representation of a number

Given a number N, toggle all the bits to the right of the most significant bit (MSB) bit (and including MSB also) in the binary representation of the number.
Input will be an integer N.
Solution will be an integer having Ns all bits inverted after the MSB.

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  • Sincere thanks from IDeserve community to Saurabh Kumar for compiling current post.

    Saurabh Kumar