def CopyToDateTimeString(self):
if (self._timestamp is None or self._timestamp < <NUM_LIT:0> or<EOL>self._timestamp > self._UINT60_MAX):<EOL><INDENT>return None<EOL><DEDENT>timestamp, remainder = divmod(self._timestamp, self._100NS_PER_SECOND)<EOL>number_of_days, hours, minutes, seconds = self._GetTimeValues(timestamp)<EOL>year, month, day_of_month = self._GetDateValuesWithEpoch(<EOL>number_of_days, self._EPOCH)<EOL>return '<STR_LIT>'.format(<EOL>year, month, day_of_month, hours, minutes, seconds, remainder)<EOL>
Copies the UUID timestamp to a date and time string.

        Returns:
          str: date and time value formatted as: "YYYY-MM-DD hh:mm:ss.#######" or
              None if the timestamp is missing or invalid.