871104785243813 has 16 divisors (see below), whose sum is σ = 873758414689776. Its totient is φ = 868454540759040.

The previous prime is 871104785243801. The next prime is 871104785243831. The reversal of 871104785243813 is 318342587401178.

It can be written as a sum of positive squares in 8 ways, for example, as 71824980901444 + 799279804342369 = 8474962^2 + 28271537^2 .

It is a cyclic number.

It is not a de Polignac number, because 871104785243813 - 2²⁰ = 871104784195237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871104785245813) 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, 15985599995 + ... + 15985654487.

It is an arithmetic number, because the mean of its divisors is an integer number (54609900918111).

Almost surely, 2^{871104785243813} is an apocalyptic number.

It is an amenable number.

871104785243813 is a deficient number, since it is larger than the sum of its proper divisors (2653629445963).

871104785243813 is a wasteful number, since it uses less digits than its factorization.

871104785243813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84664.

The product of its (nonzero) digits is 36126720, while the sum is 62.

The spelling of 871104785243813 in words is "eight hundred seventy-one trillion, one hundred four billion, seven hundred eighty-five million, two hundred forty-three thousand, eight hundred thirteen".