81387517597483 has 2 divisors, whose sum is σ = 81387517597484. Its totient is φ = 81387517597482.

The previous prime is 81387517597481. The next prime is 81387517597591. The reversal of 81387517597483 is 38479571578318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81387517597483 - 2¹ = 81387517597481 is a prime.

Together with 81387517597481, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (81387517597481) by changing a digit.

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 as a sum of consecutive naturals, namely, 40693758798741 + 40693758798742.

It is an arithmetic number, because the mean of its divisors is an integer number (40693758798742).

Almost surely, 2^{81387517597483} is an apocalyptic number.

81387517597483 is a deficient number, since it is larger than the sum of its proper divisors (1).

81387517597483 is an equidigital number, since it uses as much as digits as its factorization.

81387517597483 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1422489600, while the sum is 76.

The spelling of 81387517597483 in words is "eighty-one trillion, three hundred eighty-seven billion, five hundred seventeen million, five hundred ninety-seven thousand, four hundred eighty-three".