10449521280 is a `hidden beast` number, since 10 + 4 + 49 + 521 + 2 + 80 = 666.
It is an unprimeable number.
Almost surely, 210449521280 is an apocalyptic number.
10449521280 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 10449521280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20965651200).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
10449521280 is a wasteful number, since it uses less digits than its factorization.
10449521280 is an odious number, because the sum of its binary digits is odd.
The spelling of 10449521280 in words is "ten billion, four hundred forty-nine million, five hundred twenty-one thousand, two hundred eighty".