It is a nialpdrome in base 8 and base 16.
It is a zygodrome in base 2 and base 16.
It is an unprimeable number.
In principle, a polygon with 855638016 sides can be constructed with ruler and compass.
Almost surely, 2855638016 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 855638016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1207959516).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
855638016 is an frugal number, since it uses more digits than its factorization.
855638016 is an evil number, because the sum of its binary digits is even.
The square root of 855638016 is about 29251.2908433115. The cubic root of 855638016 is about 949.3580209321.
The spelling of 855638016 in words is "eight hundred fifty-five million, six hundred thirty-eight thousand, sixteen".