It is a congruent number.
It is an unprimeable number.
Almost surely, 226297454580820 is an apocalyptic number.
26297454580820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
26297454580820 is an frugal number, since it uses more digits than its factorization.
26297454580820 is an odious number, because the sum of its binary digits is odd.
The spelling of 26297454580820 in words is "twenty-six trillion, two hundred ninety-seven billion, four hundred fifty-four million, five hundred eighty thousand, eight hundred twenty".