It is a taxicab number since it can be written as a sum of two cubes in more than one way. Here 9978655232 = 7963 + 21163 = 16723 + 17443.
Almost surely, 29978655232 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 9978655232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12474118272).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
9978655232 is a wasteful number, since it uses less digits than its factorization.
9978655232 is an odious number, because the sum of its binary digits is odd.
The square root of 9978655232 is about 99893.2191492496. The cubic root of 9978655232 is about 2152.9007344952.
The spelling of 9978655232 in words is "nine billion, nine hundred seventy-eight million, six hundred fifty-five thousand, two hundred thirty-two".