It is a congruent number.
It is an unprimeable number.
Almost surely, 256055055005255 is an apocalyptic number.
56055055005255 is a wasteful number, since it uses less digits than its factorization.
56055055005255 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 193257027.
The spelling of 56055055005255 in words is "fifty-six trillion, fifty-five billion, fifty-five million, five thousand, two hundred fifty-five".