81748083727 has 2 divisors, whose sum is σ = 81748083728. Its totient is φ = 81748083726.

The previous prime is 81748083709. The next prime is 81748083763. The reversal of 81748083727 is 72738084718.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81748083727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81748083427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40874041863 + 40874041864.

It is an arithmetic number, because the mean of its divisors is an integer number (40874041864).

Almost surely, 2^81748083727 is an apocalyptic number.

81748083727 is a deficient number, since it is larger than the sum of its proper divisors (1).

81748083727 is an equidigital number, since it uses as much as digits as its factorization.

81748083727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4214784, while the sum is 55.

Subtracting from 81748083727 its reverse (72738084718), we obtain a palindrome (9009999009).

The spelling of 81748083727 in words is "eighty-one billion, seven hundred forty-eight million, eighty-three thousand, seven hundred twenty-seven".