871105866025631 has 4 divisors (see below), whose sum is σ = 871171614840000. Its totient is φ = 871040117211264.

The previous prime is 871105866025621. The next prime is 871105866025751. The reversal of 871105866025631 is 136520668501178.

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 871105866025631 - 2²² = 871105861831327 is a prime.

It is a super-2 number, since 2×871105866025631² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871105866025621) 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, 32874387311 + ... + 32874413808.

It is an arithmetic number, because the mean of its divisors is an integer number (217792903710000).

Almost surely, 2^{871105866025631} is an apocalyptic number.

871105866025631 is a deficient number, since it is larger than the sum of its proper divisors (65748814369).

871105866025631 is a wasteful number, since it uses less digits than its factorization.

871105866025631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65748814368.

The product of its (nonzero) digits is 14515200, while the sum is 59.

The spelling of 871105866025631 in words is "eight hundred seventy-one trillion, one hundred five billion, eight hundred sixty-six million, twenty-five thousand, six hundred thirty-one".