869191080871 has 4 divisors (see below), whose sum is σ = 869215553200. Its totient is φ = 869166608544.

The previous prime is 869191080847. The next prime is 869191080907. The reversal of 869191080871 is 178080191968.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 869191080871 - 2⁵ = 869191080839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869191080841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12182811 + ... + 12253948.

It is an arithmetic number, because the mean of its divisors is an integer number (217303888300).

Almost surely, 2^869191080871 is an apocalyptic number.

869191080871 is a deficient number, since it is larger than the sum of its proper divisors (24472329).

869191080871 is a wasteful number, since it uses less digits than its factorization.

869191080871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24472328.

The product of its (nonzero) digits is 1741824, while the sum is 58.

The spelling of 869191080871 in words is "eight hundred sixty-nine billion, one hundred ninety-one million, eighty thousand, eight hundred seventy-one".