Well, it sounds like you'd be at least $9 million richer than you were before. And gambling losses are tax deductable, up to the amount of your winnings, so if I understand tax deductions correctly wouldn't you be taxed only on about $200 million of the cash payout?

https://www.irs.gov/taxtopics/tc419.html https://turbotax.intuit.com/tax-tools/tax-tips/Taxes-101/Can...

There's also approximately a 90% chance that you'll have to split the prize. (estimates are that over 400 million tickets will be sold)

If you operated it as a business the lottery tickets are tax-deductible, so no taxes.