int lim;

int fun(int n,int dep){
	if(n==1) return dep;
	else{
		if(n%2==0) return fun(n/2,dep+1);
		else{
			if(n*3+1<=lim)
				return fun(n*3+1,dep+1);
			else
				return 0;
		}
	}
}

const int mod = 1000000007;

int main(){
	lim = getint();
	int ans = 0;
	int i = 1;
        starttime();
	while(i<=lim){
		ans = (ans+fun(i,0))%mod;
		i = i+1;
	}
        stoptime();
	putint(ans);
	putch(10);

}