9978544328532 has 48 divisors (see below), whose sum is σ = 26549249170752. Its totient is φ = 2889714193920.

The previous prime is 9978544328521. The next prime is 9978544328561. The reversal of 9978544328532 is 2358234458799.

9978544328532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (69) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 1881321694 + ... + 1881326997.

It is an arithmetic number, because the mean of its divisors is an integer number (553109357724).

Almost surely, 2^{9978544328532} is an apocalyptic number.

It is an amenable number.

9978544328532 is an abundant number, since it is smaller than the sum of its proper divisors (16570704842220).

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

9978544328532 is a wasteful number, since it uses less digits than its factorization.

9978544328532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3762648728 (or 3762648726 counting only the distinct ones).

The product of its digits is 522547200, while the sum is 69.

The spelling of 9978544328532 in words is "nine trillion, nine hundred seventy-eight billion, five hundred forty-four million, three hundred twenty-eight thousand, five hundred thirty-two".