Answer: quadrillion

AnswerCrossword Clue
QUADRILLIONOne followed by 15 zeros
QUADRILLIONOne followed by 15 zeroes
quadrilliona thousand raised to the fifth power
quadrillionA septillion, that is, a thousand raised to the power of eight (1024)
quadrillionA thousand raised to the power of five (1015)