It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-255355434002551 is a prime.
It is a Duffinian number.
It is a congruent number.
Almost surely, 2255355434002551 is an apocalyptic number.
255355434002551 is a wasteful number, since it uses less digits than its factorization.
255355434002551 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 15020907882520.
The spelling of 255355434002551 in words is "two hundred fifty-five trillion, three hundred fifty-five billion, four hundred thirty-four million, two thousand, five hundred fifty-one".