8821559394120 has 128 divisors (see below), whose sum is σ = 28871264522880. Its totient is φ = 2138507520000.

The previous prime is 8821559394103. The next prime is 8821559394121. The reversal of 8821559394120 is 214939551288.

It is not an unprimeable number, because it can be changed into a prime (8821559394121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105427500 + ... + 105511140.

It is an arithmetic number, because the mean of its divisors is an integer number (225556754085).

Almost surely, 2^{8821559394120} is an apocalyptic number.

It is an amenable number.

8821559394120 is an abundant number, since it is smaller than the sum of its proper divisors (20049705128760).

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

8821559394120 is a wasteful number, since it uses less digits than its factorization.

8821559394120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163567 (or 163563 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 57.

The spelling of 8821559394120 in words is "eight trillion, eight hundred twenty-one billion, five hundred fifty-nine million, three hundred ninety-four thousand, one hundred twenty".