#include <stdio.h>
#include <math.h>

unsigned int bitCount(int num);

void main () {

    /* Here's your example number, in binary format for visual purposes */

    int num = 0b10100000;

    int noTrailingZeros = num >> __builtin_ctz(num);
   
    unsigned int bitsRemain = bitCount(noTrailingZeros);

    printf(
        "Zeros: %d, No Zeros: %d, Bits remain: %d\n", 
        num, 
        noTrailingZeros, 
        bitsRemain
    );
}

unsigned int bitCount(int num) {
    unsigned int bits = 0;

    while (num) {
        bits++;
        num >>= 1;
    }

    return bits;
}


##</code><code>##

Zeros: 640, No Zeros: 5, Bits remain: 3