9881732787822 has 144 divisors (see below), whose sum is σ = 25034079182112. Its totient is φ = 2808853770240.

The previous prime is 9881732787799. The next prime is 9881732787827. The reversal of 9881732787822 is 2287872371889.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9881732787827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 250081047 + ... + 250120557.

It is an arithmetic number, because the mean of its divisors is an integer number (173847772098).

Almost surely, 2^{9881732787822} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9881732787822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12517039591056).

9881732787822 is an abundant number, since it is smaller than the sum of its proper divisors (15152346394290).

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

9881732787822 is a wasteful number, since it uses less digits than its factorization.

9881732787822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40983 (or 40973 counting only the distinct ones).

The product of its digits is 303464448, while the sum is 72.

The spelling of 9881732787822 in words is "nine trillion, eight hundred eighty-one billion, seven hundred thirty-two million, seven hundred eighty-seven thousand, eight hundred twenty-two".