No, I mean kg. Hyperdense muscle and bone makes him a lot heavier.

He's nowhere near unkillable - he's tough, but a bullet will still cause him some serious trouble. He's strong, but he can't smash down a big, thick curtain wall with his bare hands. He's fast, but no more so than Usain Bolt (he can just sustain that speed for a longer time). His reflexes are good, but a shot from a gun he hasn't noticed will still catch him out, and he can't avoid large numbers of attackers.

He may be on the high end of the power spectrum, but one shot from a taser and he's down. A well-aimed sniper bullet will kill him. He's got no defense against gas. Being run over would break a lot of things. Just because he's strong and tough doesn't make him unkillable.