81043710808 has 16 divisors (see below), whose sum is σ = 154224973080. Its totient is φ = 39917051328.

The previous prime is 81043710779. The next prime is 81043710827. The reversal of 81043710808 is 80801734018.

It is a congruent number.

It is an unprimeable number.

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, 75599941 + ... + 75601012.

Almost surely, 2^81043710808 is an apocalyptic number.

It is an amenable number.

81043710808 is a deficient number, since it is larger than the sum of its proper divisors (73181262272).

81043710808 is a wasteful number, since it uses less digits than its factorization.

81043710808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151201026 (or 151201022 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The spelling of 81043710808 in words is "eighty-one billion, forty-three million, seven hundred ten thousand, eight hundred eight".