9978655232 has 160 divisors (see below), whose sum is σ = 24948236544. Its totient is φ = 3881779200.

The previous prime is 9978655231. The next prime is 9978655273. The reversal of 9978655232 is 2325568799.

It is a Harshad number since it is a multiple of its sum of digits (56).

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.

It is not an unprimeable number, because it can be changed into a prime (9978655231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2840357 + ... + 2843867.

Almost surely, 2^9978655232 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).

9978655232 is an abundant number, since it is smaller than the sum of its proper divisors (14969581312).

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 sum of its prime factors is 3610 (or 3594 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 56.

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".