81351415318 has 8 divisors (see below), whose sum is σ = 122640325200. Its totient is φ = 40471306920.

The previous prime is 81351415291. The next prime is 81351415331.

81351415318 is nontrivially palindromic in base 10.

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

It is a super-2 number, since 2×81351415318² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102199873 + ... + 102200668.

It is an arithmetic number, because the mean of its divisors is an integer number (15330040650).

Almost surely, 2^81351415318 is an apocalyptic number.

81351415318 is a deficient number, since it is larger than the sum of its proper divisors (41288909882).

81351415318 is a wasteful number, since it uses less digits than its factorization.

81351415318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204400742.

The product of its digits is 57600, while the sum is 40.

The spelling of 81351415318 in words is "eighty-one billion, three hundred fifty-one million, four hundred fifteen thousand, three hundred eighteen".