871444875667 has 4 divisors (see below), whose sum is σ = 877216033936. Its totient is φ = 865673717400.

The previous prime is 871444875619. The next prime is 871444875689. The reversal of 871444875667 is 766578444178.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 766578444178 = 2 ⋅383289222089.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871444875667 is a prime.

It is a super-4 number, since 4×871444875667⁴ (a number of 49 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871444875617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2885578908 + ... + 2885579209.

It is an arithmetic number, because the mean of its divisors is an integer number (219304008484).

Almost surely, 2^871444875667 is an apocalyptic number.

871444875667 is a deficient number, since it is larger than the sum of its proper divisors (5771158269).

871444875667 is a wasteful number, since it uses less digits than its factorization.

871444875667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5771158268.

The product of its digits is 252887040, while the sum is 67.

The spelling of 871444875667 in words is "eight hundred seventy-one billion, four hundred forty-four million, eight hundred seventy-five thousand, six hundred sixty-seven".