# Can a black hole reach a limit where it can no longer attract more matter?

Can a black hole reach a limit where it can no longer attract more matter? If so, what happens with that black hole? Does the black hole die? Does the black hole decrease its size?

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Note, that a black hole is not a cosmic vacuum cleaner, sucking in everything around. It behaves just like any other object with gravity. If you suddenly switched the Sun for a black hole with the same mass, it would have absolutely no effect on the solar system (besides darkness, of course). All the planets would orbit just like they did it before, they wouldn't be "sucked in". Orbiting a black hole is no more dangerous than orbiting a star, the only danger would be if you got too close to the event horizon, but even in case of a star you would be burned if you got so close. – vsz Jan 5 '15 at 16:11

The estimates for the currently (as of early 2014) known most massive black holes (ultramassive black holes) are below about 40 billion ($4\cdot 10^{10}$) solar masses. A black hole of that mass would have a Schwarzschild radius of about 780 times the distance Earth-Sun, or about 4.5 light-days.