Market cap is $17B, and market premium would be huge. Might require about $30B or so to buy it outright. Intel doesn't have that in cash, but they could probably raise the capital. Would make the McAfee take-over seem minor, and it would take 30-40 years to make it back in revenues. It would be a horrible investment.
Intel probably could afford it but the price is completely unreasonable. It would exceed even AMD's purchase of ATI in overpayment stupidity. A CEO who'd consider it probably couldn't get hired even by HP let alone Intel.