It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 87912121161575.
It is a congruent number.
It is an unprimeable number.
Almost surely, 287912121161575 is an apocalyptic number.
87912121161575 is a wasteful number, since it uses less digits than its factorization.
87912121161575 is an evil number, because the sum of its binary digits is even.
The spelling of 87912121161575 in words is "eighty-seven trillion, nine hundred twelve billion, one hundred twenty-one million, one hundred sixty-one thousand, five hundred seventy-five".