Claims to be the IRS and demanding information. If you call them out on it they either hang up, or start cussing and threatening you.

Total scam.  Originates in either India or Pakistan.   Block and ignore.   DO NOT RETURN THE CALL!
See:  http://www.irs.gov/uac/Newsroom/IRS-Reiterate ... -Telephone-Scam

Report them:
https://www.treasury.gov/tigta/contact_report_scam.shtml
I’m an Enrolled Agent with the IRS (Inactive). IRS does not initiate contacts by phone.  US mail only.   IRS does not file lawsuits.  IRS has enough administrative authority under the IRS Code and related regulations to collect all taxes lawfully due the federal government.     Court action, if any is handled by the DOJ and all parties are entitled to legal assistance if it is a criminal matter.  But--tax disputes are for the most part civil matters.  90% of all IRS tax disputes are settled administratively.  IRS has absolutely no authority to call on local law enforcement for anything. Local law is never involved in IRS tax disputes. IRS does not threaten to involve local law enforcement or to arrest you for nonpayment of federal taxes.  IRS has no powers of arrest as related to ordinary tax disputes.  Having a deficiency in taxes owed by way of audit is NOT a crime.  IRS does not cold call anyone and demand immediate payment of  money.  IRS does not ask for financial information over the phone.   IRS does not accept Green card money paks for payment in any case.  No one is prosecuted for ordinary tax disputes. IRS has absolutely no authority over anyone's professional license. Professional licensing is handled by state governments.  Yes, levies on property to satisfy an existing tax obligation do occur, but only after a very long period of negotiation. And yes, liens are placed on individuals but  usually after a lot of negotiation and a failure to reach a settlement.    All determinations of tax liability are subject to appeals.  All  contacts by the IRS are initiated by US mail.
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I just got a call from them also.  They were wanting my information.  I said. If you are the IRS don't you have my information already??  At that point they hung up on me.  Lol!  Obviously this is a scam. IRS WILL NEVER INITIATE CONTACT VIA A PHONE CALL.  U.S. Mail only. I will be reporting them to the real IRS.

I just got this call, and they were very threatening, and said the police are coming to arrest me.

I rec'd call approx 30 mins ago from this number, hung up on me!  I called back and the receiver of call said "IRS.". This makes me angry cause he couldn't properly speak English or explained why he called me!