It is a congruent number.
It is an unprimeable number.
Almost surely, 212740340561920 is an apocalyptic number.
12740340561920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 12740340561920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16208931604320).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12740340561920 is a wasteful number, since it uses less digits than its factorization.
12740340561920 is an evil number, because the sum of its binary digits is even.
The spelling of 12740340561920 in words is "twelve trillion, seven hundred forty billion, three hundred forty million, five hundred sixty-one thousand, nine hundred twenty".