It is a congruent number.
It is an unprimeable number.
Almost surely, 215534513012 is an apocalyptic number.
15534513012 is a gapful number since it is divisible by the number (12) 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 15534513012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19517319360).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
15534513012 is a wasteful number, since it uses less digits than its factorization.
15534513012 is an odious number, because the sum of its binary digits is odd.
The spelling of 15534513012 in words is "fifteen billion, five hundred thirty-four million, five hundred thirteen thousand, twelve".