import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String s = br.readLine().trim();

        formula builder = new formula(s);
        List<Long> results = builder.build();

        int primeCount = 0;
        Prime checker = new Prime();

        for (long v : results) {
            if (checker.isPrime(v)) {
                primeCount++;
            }
        }

        System.out.println(primeCount);
    }
}

class Prime {
    public boolean isPrime(long num) {
        if (num < 2)
            return false;
        for (long i = 2; i * i <= num; i++) {
            if (num % i == 0)
                return false;
        }
        return true;
    }
}

class formula {
    private final String s;
    private final List<Long> results = new ArrayList<>();

    public formula(String s) {
        this.s = s;
    }

    public List<Long> build() {
        xp(1, s.charAt(0) - '0', 0);
        return results;
    }

    private void xp(int index, long current, long sum) {
        if (index == s.length()) {
            results.add(sum + current);
            return;
        }

        int digit = s.charAt(index) - '0';
        xp(index + 1, current * 10 + digit, sum);
        xp(index + 1, digit, sum + current);
    }
}