9918444875328 has 336 divisors, whose sum is σ = 32344481594880. Its totient is φ = 2878643404800.

The previous prime is 9918444875303. The next prime is 9918444875333. The reversal of 9918444875328 is 8235784448199.

It is a happy number.

9918444875328 is a `hidden beast` number, since 9 + 9 + 1 + 8 + 4 + 4 + 4 + 87 + 532 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18792058 + ... + 19312646.

It is an arithmetic number, because the mean of its divisors is an integer number (96263338080).

Almost surely, 2^{9918444875328} 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 9918444875328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16172240797440).

9918444875328 is an abundant number, since it is smaller than the sum of its proper divisors (22426036719552).

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

9918444875328 is a wasteful number, since it uses less digits than its factorization.

9918444875328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520746 (or 520733 counting only the distinct ones).

The product of its digits is 557383680, while the sum is 72.

The spelling of 9918444875328 in words is "nine trillion, nine hundred eighteen billion, four hundred forty-four million, eight hundred seventy-five thousand, three hundred twenty-eight".