871668430456861 has 16 divisors (see below), whose sum is σ = 931293366784000. Its totient is φ = 813419660492208.

The previous prime is 871668430456829. The next prime is 871668430456871. The reversal of 871668430456861 is 168654034866178.

It is a cyclic number.

It is not a de Polignac number, because 871668430456861 - 2⁵ = 871668430456829 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 (871668430456871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2949706 + ... + 41857348.

It is an arithmetic number, because the mean of its divisors is an integer number (58205835424000).

Almost surely, 2^{871668430456861} is an apocalyptic number.

It is an amenable number.

871668430456861 is a deficient number, since it is larger than the sum of its proper divisors (59624936327139).

871668430456861 is a wasteful number, since it uses less digits than its factorization.

871668430456861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38925328.

The product of its (nonzero) digits is 1114767360, while the sum is 73.

The spelling of 871668430456861 in words is "eight hundred seventy-one trillion, six hundred sixty-eight billion, four hundred thirty million, four hundred fifty-six thousand, eight hundred sixty-one".