871671232471643 has 4 divisors (see below), whose sum is σ = 892931506434408. Its totient is φ = 850410958508880.

The previous prime is 871671232471607. The next prime is 871671232471681. The reversal of 871671232471643 is 346174232176178.

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 871671232471643 - 2¹⁴ = 871671232455259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871671232471693) 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 3 ways as a sum of consecutive naturals, for example, 10630136981321 + ... + 10630136981402.

It is an arithmetic number, because the mean of its divisors is an integer number (223232876608602).

Almost surely, 2^{871671232471643} is an apocalyptic number.

871671232471643 is a deficient number, since it is larger than the sum of its proper divisors (21260273962765).

871671232471643 is a wasteful number, since it uses less digits than its factorization.

871671232471643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21260273962764.

The product of its digits is 56899584, while the sum is 62.

The spelling of 871671232471643 in words is "eight hundred seventy-one trillion, six hundred seventy-one billion, two hundred thirty-two million, four hundred seventy-one thousand, six hundred forty-three".