871665826105216 has 32 divisors (see below), whose sum is σ = 1740666206399400. Its totient is φ = 434792739009024.

The previous prime is 871665826105189. The next prime is 871665826105259. The reversal of 871665826105216 is 612501628566178.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8126305875 + ... + 8126413138.

Almost surely, 2^{871665826105216} is an apocalyptic number.

It is an amenable number.

871665826105216 is a deficient number, since it is larger than the sum of its proper divisors (869000380294184).

871665826105216 is a wasteful number, since it uses less digits than its factorization.

871665826105216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16252719446 (or 16252719434 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 64.

The spelling of 871665826105216 in words is "eight hundred seventy-one trillion, six hundred sixty-five billion, eight hundred twenty-six million, one hundred five thousand, two hundred sixteen".