101559990680640 is a `hidden beast` number, since 10 + 1 + 559 + 9 + 9 + 0 + 6 + 8 + 0 + 64 + 0 = 666.
It is a Leyland number of the form 186 + 618.
It is a congruent number.
It is an unprimeable number.
Almost surely, 2101559990680640 is an apocalyptic number.
101559990680640 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 101559990680640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187643265436620).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
101559990680640 is an frugal number, since it uses more digits than its factorization.
101559990680640 is an odious number, because the sum of its binary digits is odd.
The spelling of 101559990680640 in words is "one hundred one trillion, five hundred fifty-nine billion, nine hundred ninety million, six hundred eighty thousand, six hundred forty".