871161580828 has 144 divisors (see below), whose sum is σ = 1943574339168. Its totient is φ = 337853376000.

The previous prime is 871161580813. The next prime is 871161580871. The reversal of 871161580828 is 828085161178.

871161580828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 821075418 + ... + 821076478.

It is an arithmetic number, because the mean of its divisors is an integer number (13497044022).

Almost surely, 2^871161580828 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 871161580828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (971787169584).

871161580828 is an abundant number, since it is smaller than the sum of its proper divisors (1072412758340).

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

871161580828 is a wasteful number, since it uses less digits than its factorization.

871161580828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484 (or 2475 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 55.

The spelling of 871161580828 in words is "eight hundred seventy-one billion, one hundred sixty-one million, five hundred eighty thousand, eight hundred twenty-eight".