Answered a call from this number. 45 seconds of silence before the other side picked up.

A person with an Indian accent asked, "Do you take the Cialis pill, sir? Do you take the Viagra or Cialis pill?"

Are the last four numbers of your Social Security 0001?
Uhm.  No.

Try this, in your best radio announcer's voice, when answering these spam calls (Don't pause long enough for them to say anything - just keep talking):
"You are caller number 5 on KLUE, the best station in the valley for music, news and talk.  You have 3 seconds to answer today's question, starting now. 3 - 2 - 1.  Sorry, you didn't answer the question.  Better luck next time.  Goodbye."  Then hang up and block the number.

Or try this:
"9-1-1, what is your emergency?"
I did that once and there was silence for a couple beats, then a man said, "Oh, my God, I am so sorry."   Then he hung up.  I have never received another call from that particular number.

I received a call from this number, I let it go without answering, but I found it interesting that the only thing it said for location was United States, which it probably was not.