If you put the US debt worth $1 in one line, it will be as follows (taking into account the dollar length of 156 mm):
About 55,000 times around the equator
More than 5,000 distances to the moon
Three times seven (!) To the sun and back.
I tried virtually putting them on each other and got ~ 4 columns to the moon. So my mortgage (reassured myself) with the distance to the ATM is like it compared to this.