Adding to 12513263756358 its reverse (85365736231521), we get a palindrome (97878999987879).
It is a congruent number.
Almost surely, 212513263756358 is an apocalyptic number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12513263756358 is a wasteful number, since it uses less digits than its factorization.
12513263756358 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 15307053.
The spelling of 12513263756358 in words is "twelve trillion, five hundred thirteen billion, two hundred sixty-three million, seven hundred fifty-six thousand, three hundred fifty-eight".