8891384773920 has 864 divisors, whose sum is σ = 34257347361216. Its totient is φ = 1921801420800.

The previous prime is 8891384773907. The next prime is 8891384773949. The reversal of 8891384773920 is 293774831988.

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

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 550849050 + ... + 550865190.

It is an arithmetic number, because the mean of its divisors is an integer number (39649707594).

Almost surely, 2^{8891384773920} is an apocalyptic number.

8891384773920 is a gapful number since it is divisible by the number (80) 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 8891384773920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17128673680608).

8891384773920 is an abundant number, since it is smaller than the sum of its proper divisors (25365962587296).

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

8891384773920 is a wasteful number, since it uses less digits than its factorization.

8891384773920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16242 (or 16198 counting only the distinct ones).

The product of its (nonzero) digits is 146313216, while the sum is 69.

The spelling of 8891384773920 in words is "eight trillion, eight hundred ninety-one billion, three hundred eighty-four million, seven hundred seventy-three thousand, nine hundred twenty".