#include <bits/stdc++.h>
using namespace std;

using i64 = long long;

inline i64 lb(i64 x) {return x & (-x);}

i64 check(i64 x, int k)
{
	i64 sum = 0;
	while (k--)
	{
		sum += x;
		x /= 2;
	}
	return sum;
}

void solve() {
    i64 n, minx;
    
    cin >> n;
    minx = n;
    double d = 1.0;
    for(int i = 2; i <= 61; i ++) {
        d += 1.0 / i;
        i64 p = n / d;
        for(i64 x = p - 100; x <= p + 100; x ++) {
            if(check(x, i) == n) minx = min(minx, x);
        }
    }
    cout << minx << "\n";
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int T;
    T = 1;
    while(T --)
        solve();
}