9978544032 has 96 divisors (see below), whose sum is σ = 27950368320. Its totient is φ = 3107911680.

The previous prime is 9978544021. The next prime is 9978544061. The reversal of 9978544032 is 2304458799.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95682 + ... + 170622.

It is an arithmetic number, because the mean of its divisors is an integer number (291149670).

Almost surely, 2^9978544032 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 9978544032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13975184160).

9978544032 is an abundant number, since it is smaller than the sum of its proper divisors (17971824288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9978544032 is a wasteful number, since it uses less digits than its factorization.

9978544032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75046 (or 75038 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The square root of 9978544032 is about 99892.6625533627. The cubic root of 9978544032 is about 2152.8927373103.

The spelling of 9978544032 in words is "nine billion, nine hundred seventy-eight million, five hundred forty-four thousand, thirty-two".