81336044063318 has 8 divisors (see below), whose sum is σ = 133095344830920. Its totient is φ = 36970929119680.

The previous prime is 81336044063297. The next prime is 81336044063333.

81336044063318 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1848546455963 + ... + 1848546456006.

It is an arithmetic number, because the mean of its divisors is an integer number (16636918103865).

Almost surely, 2^{81336044063318} is an apocalyptic number.

81336044063318 is a deficient number, since it is larger than the sum of its proper divisors (51759300767602).

81336044063318 is a wasteful number, since it uses less digits than its factorization.

81336044063318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3697092911982.

The product of its (nonzero) digits is 2985984, while the sum is 50.

The spelling of 81336044063318 in words is "eighty-one trillion, three hundred thirty-six billion, forty-four million, sixty-three thousand, three hundred eighteen".