805118443871 has 32 divisors (see below), whose sum is σ = 988392569472. Its totient is φ = 640141885440.

The previous prime is 805118443771. The next prime is 805118443873. The reversal of 805118443871 is 178344811508.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 805118443871 - 2¹⁸ = 805118181727 is a prime.

It is a super-2 number, since 2×805118443871² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805118443873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2637155 + ... + 2926571.

It is an arithmetic number, because the mean of its divisors is an integer number (30887267796).

Almost surely, 2^805118443871 is an apocalyptic number.

805118443871 is a deficient number, since it is larger than the sum of its proper divisors (183274125601).

805118443871 is a wasteful number, since it uses less digits than its factorization.

805118443871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289779.

The product of its (nonzero) digits is 860160, while the sum is 50.

The spelling of 805118443871 in words is "eight hundred five billion, one hundred eighteen million, four hundred forty-three thousand, eight hundred seventy-one".