81346740383 has 2 divisors, whose sum is σ = 81346740384. Its totient is φ = 81346740382.

The previous prime is 81346740379. The next prime is 81346740389. The reversal of 81346740383 is 38304764318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81346740383 - 2² = 81346740379 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81346740389) by changing a digit.

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 as a sum of consecutive naturals, namely, 40673370191 + 40673370192.

It is an arithmetic number, because the mean of its divisors is an integer number (40673370192).

Almost surely, 2^81346740383 is an apocalyptic number.

81346740383 is a deficient number, since it is larger than the sum of its proper divisors (1).

81346740383 is an equidigital number, since it uses as much as digits as its factorization.

81346740383 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 81346740383 in words is "eighty-one billion, three hundred forty-six million, seven hundred forty thousand, three hundred eighty-three".