555555555555555555555

This number is a composite.

                                                     5 5555555555 5555555555

The smallest rep-digit number, (consisting of 21 5’s), whose prime factors contain all the digits, i.e., 555555555555555555555 = 3 * 5 * 37 * 43 * 239 * 1933 * 4649 * 10838689. [Loungrides]