81143544534118 has 8 divisors (see below), whose sum is σ = 132780345601320. Its totient is φ = 36883429333680.

The previous prime is 81143544534061. The next prime is 81143544534133.

81143544534118 is nontrivially palindromic in base 10.

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

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, 1844171466663 + ... + 1844171466706.

It is an arithmetic number, because the mean of its divisors is an integer number (16597543200165).

Almost surely, 2^{81143544534118} is an apocalyptic number.

81143544534118 is a deficient number, since it is larger than the sum of its proper divisors (51636801067202).

81143544534118 is a wasteful number, since it uses less digits than its factorization.

81143544534118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3688342933382.

The product of its digits is 3686400, while the sum is 52.

The spelling of 81143544534118 in words is "eighty-one trillion, one hundred forty-three billion, five hundred forty-four million, five hundred thirty-four thousand, one hundred eighteen".