26584...42176 (37-digits)

This number is a composite.

                                    2658455 9915698317 4465469261 5953842176

Just showing those entries submitted by 'Gupta': (Click here to show all)

Since 2^61-1 is prime, we know that 2^60*(2^61-1) is a perfect number. Note that it contains each of the nine non-zero digits at least once. [Gupta]