871345816471647 has 18 divisors (see below), whose sum is σ = 1383431512104096. Its totient is φ = 528088373618520.

The previous prime is 871345816471639. The next prime is 871345816471709. The reversal of 871345816471647 is 746174618543178.

871345816471647 is a `hidden beast` number, since 8 + 7 + 1 + 3 + 458 + 1 + 6 + 4 + 7 + 164 + 7 = 666.

It is not a de Polignac number, because 871345816471647 - 2³ = 871345816471639 is a prime.

It is a super-2 number, since 2×871345816471647² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871345816471547) 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 17 ways as a sum of consecutive naturals, for example, 400066948623 + ... + 400066950800.

Almost surely, 2^{871345816471647} is an apocalyptic number.

871345816471647 is a deficient number, since it is larger than the sum of its proper divisors (512085695632449).

871345816471647 is a wasteful number, since it uses less digits than its factorization.

871345816471647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800133899451 (or 800133899437 counting only the distinct ones).

The product of its digits is 758661120, while the sum is 72.

The spelling of 871345816471647 in words is "eight hundred seventy-one trillion, three hundred forty-five billion, eight hundred sixteen million, four hundred seventy-one thousand, six hundred forty-seven".