#include<iostream>
#include<vector>
#define rep(i,n) for(i=0;i<(int)(n);i++)
using namespace std;
typedef long long ll;

ll n;

bool judge(ll n){
    int i,j;
    ll sum=0;
    sum+=1+n;
    for(i=2;(ll)i*i<=n;i+=2){
        if(n%i==0){
            sum+=i+n/i;
            if(sum>2*n)return false;
        }
    }
    return sum==2*n;
}

int main(){
    int i,j;
    //rep(i,1000)if(judge(i+1))printf("%d\n",i+1);return 0;
    scanf("%lld",&n);
    printf("%s\n",judge(n)?"Yes":"No");
    return 0;
}