871187184791 has 16 divisors (see below), whose sum is σ = 1096909475328. Its totient is φ = 672125892000.

The previous prime is 871187184773. The next prime is 871187184817. The reversal of 871187184791 is 197481781178.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 871187184791 - 2¹⁴ = 871187168407 is a prime.

It is a super-2 number, since 2×871187184791² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871187184701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56002715 + ... + 56018268.

It is an arithmetic number, because the mean of its divisors is an integer number (68556842208).

Almost surely, 2^871187184791 is an apocalyptic number.

871187184791 is a deficient number, since it is larger than the sum of its proper divisors (225722290537).

871187184791 is a wasteful number, since it uses less digits than its factorization.

871187184791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112021102.

The product of its digits is 6322176, while the sum is 62.

The spelling of 871187184791 in words is "eight hundred seventy-one billion, one hundred eighty-seven million, one hundred eighty-four thousand, seven hundred ninety-one".