9798788421888 has 72 divisors (see below), whose sum is σ = 26103930132000. Its totient is φ = 3263148847104.

The previous prime is 9798788421881. The next prime is 9798788421911. The reversal of 9798788421888 is 8881248878979.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9798788421881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5275798 + ... + 6887061.

Almost surely, 2^{9798788421888} is an apocalyptic number.

It is an amenable number.

9798788421888 is an abundant number, since it is smaller than the sum of its proper divisors (16305141710112).

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

9798788421888 is a wasteful number, since it uses less digits than its factorization.

9798788421888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12163927 (or 12163913 counting only the distinct ones).

The product of its digits is 8323596288, while the sum is 87.

The spelling of 9798788421888 in words is "nine trillion, seven hundred ninety-eight billion, seven hundred eighty-eight million, four hundred twenty-one thousand, eight hundred eighty-eight".