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

vector<int64_t> divs(int64_t N){
    vector<int64_t> res;
    for(int64_t i=1; i*i <= N; i++) if(N%i == 0){
        res.push_back(i);
        if(i < N/i) res.push_back(N/i);
    }
    return res;
}

int main(){
    int64_t N;
    cin >> N;

    int64_t ans = divs(N-1).size()-1;
    auto D = divs(N);
    for(int64_t k : D) if(k != 1){
        int64_t n = N;
        while(n%k == 0) n /= k;
        if(n%k == 1) ans++;
    }
    cout << ans << endl;
    return 0;
}
