#! /usr/bin/env python3

import itertools

def f(n):
    l = []
    a, b = 0, 2
    while b * b <= n:
        if n % b == 0:
            n //= b
            l += [b]
        else:
            b += 1 + a
            a = 1
    if n > 1 : l += [n]
    return [1] + l

def g(a, b):
    r = []
    for i in a:
        if i in b:
            b.remove(i)
            r += [i]
    return r
    

def to_n(l):
    return int(''.join(l))

l = input()
s = set([])
for i in itertools.permutations(l, len(l)):
    t = to_n(i)
    s.add(t)
a = f(sorted(s)[0])
for i in s:
    a = g(a, f(i))
ans = 1
for i in a:
    ans *= i
print(ans)