It is a congruent number.
It is an unprimeable number.
Almost surely, 240274161726520 is an apocalyptic number.
40274161726520 is a gapful number since it is divisible by the number (40) 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.
40274161726520 is a wasteful number, since it uses less digits than its factorization.
40274161726520 is an odious number, because the sum of its binary digits is odd.
The spelling of 40274161726520 in words is "forty trillion, two hundred seventy-four billion, one hundred sixty-one million, seven hundred twenty-six thousand, five hundred twenty".