81373422437318 has 8 divisors (see below), whose sum is σ = 133156509442920. Its totient is φ = 36987919289680.

The previous prime is 81373422437287. The next prime is 81373422437327.

81373422437318 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 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, 1849395964463 + ... + 1849395964506.

It is an arithmetic number, because the mean of its divisors is an integer number (16644563680365).

Almost surely, 2^{81373422437318} is an apocalyptic number.

81373422437318 is a deficient number, since it is larger than the sum of its proper divisors (51783087005602).

81373422437318 is a wasteful number, since it uses less digits than its factorization.

81373422437318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3698791928982.

The product of its digits is 16257024, while the sum is 56.

The spelling of 81373422437318 in words is "eighty-one trillion, three hundred seventy-three billion, four hundred twenty-two million, four hundred thirty-seven thousand, three hundred eighteen".