871945032817 has 4 divisors (see below), whose sum is σ = 871951409140. Its totient is φ = 871938656496.

The previous prime is 871945032809. The next prime is 871945032821. The reversal of 871945032817 is 718230549178.

871945032817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 222101068176 + 649843964641 = 471276^2 + 806129^2 .

It is a cyclic number.

It is not a de Polignac number, because 871945032817 - 2³ = 871945032809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871945032017) 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, 2978442 + ... + 3258067.

It is an arithmetic number, because the mean of its divisors is an integer number (217987852285).

Almost surely, 2^871945032817 is an apocalyptic number.

It is an amenable number.

871945032817 is a deficient number, since it is larger than the sum of its proper divisors (6376323).

871945032817 is a wasteful number, since it uses less digits than its factorization.

871945032817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6376322.

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 871945032817 in words is "eight hundred seventy-one billion, nine hundred forty-five million, thirty-two thousand, eight hundred seventeen".