81373422437327 has 2 divisors, whose sum is σ = 81373422437328. Its totient is φ = 81373422437326.

The previous prime is 81373422437287. The next prime is 81373422437339. The reversal of 81373422437327 is 72373422437318.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81373422437327 - 2¹⁰ = 81373422436303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81373422437627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40686711218663 + 40686711218664.

It is an arithmetic number, because the mean of its divisors is an integer number (40686711218664).

Almost surely, 2^{81373422437327} is an apocalyptic number.

81373422437327 is a deficient number, since it is larger than the sum of its proper divisors (1).

81373422437327 is an equidigital number, since it uses as much as digits as its factorization.

81373422437327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28449792, while the sum is 56.

Subtracting from 81373422437327 its reverse (72373422437318), we obtain a palindrome (9000000000009).

The spelling of 81373422437327 in words is "eighty-one trillion, three hundred seventy-three billion, four hundred twenty-two million, four hundred thirty-seven thousand, three hundred twenty-seven".