871443657957 has 16 divisors (see below), whose sum is σ = 1185424512768. Its totient is φ = 569241816000.

The previous prime is 871443657947. The next prime is 871443657967. The reversal of 871443657957 is 759756344178.

It is an interprime number because it is at equal distance from previous prime (871443657947) and next prime (871443657967).

It is not a de Polignac number, because 871443657957 - 2¹⁸ = 871443395813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871443657947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3529578 + ... + 3768395.

It is an arithmetic number, because the mean of its divisors is an integer number (74089032048).

Almost surely, 2^871443657957 is an apocalyptic number.

It is an amenable number.

871443657957 is a deficient number, since it is larger than the sum of its proper divisors (313980854811).

871443657957 is a wasteful number, since it uses less digits than its factorization.

871443657957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7298780.

The product of its digits is 177811200, while the sum is 66.

The spelling of 871443657957 in words is "eight hundred seventy-one billion, four hundred forty-three million, six hundred fifty-seven thousand, nine hundred fifty-seven".