def solve(N):
    freq = [0] * 10
    lenN = len(N)
    for n in N:
        freq[int(n)] += 1
    if any(f == lenN for f in freq):
        return N
    two = 1
    if freq[1] + freq[3] + freq[5] + freq[7] + freq[9] == 0:
        two = 2
        if freq[2] + freq[6] == 0:
            two = 4
            if freq[4] == 0:
                two = 8
    pow3 = sum(f * i for i, f in enumerate(freq))
    three = 1
    if pow3 % 3 == 0:
        three = 3
        if pow3 % 9 == 0:
            three = 9
    five = 1
    if freq[0] + freq[5] == lenN:
        five = 5
    return two * three * five

N = input().rstrip()

print(solve(N))