The answer is unknown.
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17 trillion seconds = approx 540 thousand years.
Zero. There was no time measured that long ago.
1 trillion years = approx 31557600000000000000. However, the univere did not exist a rillion years ago and, according to current cosmological theories, it will not exist for a trillion years. So the answer is a meaningless exerise in multiplication.
As at the time of answering (6 August 2016) It would be 1984. In a few days though, the answer would have been 1985.
3/4 pump a gallon of gas