81710842043 has 2 divisors, whose sum is σ = 81710842044. Its totient is φ = 81710842042.

The previous prime is 81710842033. The next prime is 81710842051. The reversal of 81710842043 is 34024801718.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81710842043 - 2¹⁴ = 81710825659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81710841988 and 81710842006.

It is not a weakly prime, because it can be changed into another prime (81710842033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40855421021 + 40855421022.

It is an arithmetic number, because the mean of its divisors is an integer number (40855421022).

Almost surely, 2^81710842043 is an apocalyptic number.

81710842043 is a deficient number, since it is larger than the sum of its proper divisors (1).

81710842043 is an equidigital number, since it uses as much as digits as its factorization.

81710842043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 38.

The spelling of 81710842043 in words is "eighty-one billion, seven hundred ten million, eight hundred forty-two thousand, forty-three".