871668431572007 has 4 divisors (see below), whose sum is σ = 871668842159040. Its totient is φ = 871668020984976.

The previous prime is 871668431571967. The next prime is 871668431572021. The reversal of 871668431572007 is 700275134866178.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871668431572007 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 (871668431572097) 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, 202092407 + ... + 206360552.

It is an arithmetic number, because the mean of its divisors is an integer number (217917210539760).

Almost surely, 2^{871668431572007} is an apocalyptic number.

871668431572007 is a deficient number, since it is larger than the sum of its proper divisors (410587033).

871668431572007 is a wasteful number, since it uses less digits than its factorization.

871668431572007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410587032.

The product of its (nonzero) digits is 94832640, while the sum is 65.

The spelling of 871668431572007 in words is "eight hundred seventy-one trillion, six hundred sixty-eight billion, four hundred thirty-one million, five hundred seventy-two thousand, seven".