#include<iostream>
#include<cmath>
using namespace std;

typedef long long ll;

int main(){
    ll x;
    cin >> x;
    ll ans = 1;
    
    while(1){
        if(x%2 == 0){
            x /= 2;
            if(x%2 == 0){
                x /= 2;
            }else{
                ans *= 2;
                break;
            }
        }else{
            break;
        }
    }

    ll divisor = 3;
    
    while(divisor <= x){
        if(x%divisor == 0){
            x /= divisor;
            if(x%divisor == 0){
                x /= divisor;
            }else{
                ans *= divisor;                
            }
        }else{
            divisor += 2;
        }
    }

    cout << ans << endl;
    return 0;
}