871057071434111 has 4 divisors (see below), whose sum is σ = 871057130528424. Its totient is φ = 871057012339800.

The previous prime is 871057071434107. The next prime is 871057071434119. The reversal of 871057071434111 is 111434170750178.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 871057071434111 - 2² = 871057071434107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 871057071434111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871057071434119) 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, 12664301 + ... + 43617641.

It is an arithmetic number, because the mean of its divisors is an integer number (217764282632106).

Almost surely, 2^{871057071434111} is an apocalyptic number.

871057071434111 is a deficient number, since it is larger than the sum of its proper divisors (59094313).

871057071434111 is a wasteful number, since it uses less digits than its factorization.

871057071434111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59094312.

The product of its (nonzero) digits is 658560, while the sum is 50.

The spelling of 871057071434111 in words is "eight hundred seventy-one trillion, fifty-seven billion, seventy-one million, four hundred thirty-four thousand, one hundred eleven".