871085777234443 has 4 divisors (see below), whose sum is σ = 871176336114760. Its totient is φ = 870995218354128.

The previous prime is 871085777234437. The next prime is 871085777234459. The reversal of 871085777234443 is 344432777580178.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871085777234443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871085777274443) 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, 45279425730 + ... + 45279444967.

It is an arithmetic number, because the mean of its divisors is an integer number (217794084028690).

Almost surely, 2^{871085777234443} is an apocalyptic number.

871085777234443 is a deficient number, since it is larger than the sum of its proper divisors (90558880317).

871085777234443 is an equidigital number, since it uses as much as digits as its factorization.

871085777234443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90558880316.

The product of its (nonzero) digits is 885104640, while the sum is 70.

The spelling of 871085777234443 in words is "eight hundred seventy-one trillion, eighty-five billion, seven hundred seventy-seven million, two hundred thirty-four thousand, four hundred forty-three".