9440991866880 has 832 divisors, whose sum is σ = 38529834931200. Its totient is φ = 2148315955200.

The previous prime is 9440991866861. The next prime is 9440991866921. The reversal of 9440991866880 is 886681990449.

9440991866880 is a `hidden beast` number, since 9 + 4 + 409 + 9 + 1 + 86 + 68 + 80 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 9440991866799 and 9440991866808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 886389555 + ... + 886400205.

Almost surely, 2^{9440991866880} is an apocalyptic number.

9440991866880 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9440991866880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19264917465600).

9440991866880 is an abundant number, since it is smaller than the sum of its proper divisors (29088843064320).

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

9440991866880 is a wasteful number, since it uses less digits than its factorization.

9440991866880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10925 (or 10897 counting only the distinct ones).

The product of its (nonzero) digits is 214990848, while the sum is 72.

The spelling of 9440991866880 in words is "nine trillion, four hundred forty billion, nine hundred ninety-one million, eight hundred sixty-six thousand, eight hundred eighty".