871156085772 has 72 divisors (see below), whose sum is σ = 2373767578224. Its totient is φ = 247933206528.

The previous prime is 871156085771. The next prime is 871156085801. The reversal of 871156085772 is 277580651178.

It is a happy number.

871156085772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (871156085771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2731293 + ... + 3033524.

It is an arithmetic number, because the mean of its divisors is an integer number (32968994142).

Almost surely, 2^871156085772 is an apocalyptic number.

It is an amenable number.

871156085772 is an abundant number, since it is smaller than the sum of its proper divisors (1502611492452).

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

871156085772 is a wasteful number, since it uses less digits than its factorization.

871156085772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5765095 (or 5765086 counting only the distinct ones).

The product of its (nonzero) digits is 6585600, while the sum is 57.

The spelling of 871156085772 in words is "eight hundred seventy-one billion, one hundred fifty-six million, eighty-five thousand, seven hundred seventy-two".