871085780464855 has 4 divisors (see below), whose sum is σ = 1045302936557832. Its totient is φ = 696868624371880.

The previous prime is 871085780464847. The next prime is 871085780464891. The reversal of 871085780464855 is 558464087580178.

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

It is not a de Polignac number, because 871085780464855 - 2³ = 871085780464847 is a prime.

It is a Duffinian number.

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, 87108578046481 + ... + 87108578046490.

It is an arithmetic number, because the mean of its divisors is an integer number (261325734139458).

Almost surely, 2^{871085780464855} is an apocalyptic number.

871085780464855 is a deficient number, since it is larger than the sum of its proper divisors (174217156092977).

871085780464855 is a wasteful number, since it uses less digits than its factorization.

871085780464855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174217156092976.

The product of its (nonzero) digits is 2408448000, while the sum is 76.

The spelling of 871085780464855 in words is "eight hundred seventy-one trillion, eighty-five billion, seven hundred eighty million, four hundred sixty-four thousand, eight hundred fifty-five".