81648000943 has 2 divisors, whose sum is σ = 81648000944. Its totient is φ = 81648000942.

The previous prime is 81648000887. The next prime is 81648000977. The reversal of 81648000943 is 34900084618.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81648000943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81648000943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81648000443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40824000471 + 40824000472.

It is an arithmetic number, because the mean of its divisors is an integer number (40824000472).

Almost surely, 2^81648000943 is an apocalyptic number.

81648000943 is a deficient number, since it is larger than the sum of its proper divisors (1).

81648000943 is an equidigital number, since it uses as much as digits as its factorization.

81648000943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 81648000943 in words is "eighty-one billion, six hundred forty-eight million, nine hundred forty-three", and thus it is an aban number.