80505964943 has 2 divisors, whose sum is σ = 80505964944. Its totient is φ = 80505964942.

The previous prime is 80505964921. The next prime is 80505964951. The reversal of 80505964943 is 34946950508.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80505964943 - 2¹⁸ = 80505702799 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80505904943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40252982471 + 40252982472.

It is an arithmetic number, because the mean of its divisors is an integer number (40252982472).

Almost surely, 2^80505964943 is an apocalyptic number.

80505964943 is a deficient number, since it is larger than the sum of its proper divisors (1).

80505964943 is an equidigital number, since it uses as much as digits as its factorization.

80505964943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4665600, while the sum is 53.

The spelling of 80505964943 in words is "eighty billion, five hundred five million, nine hundred sixty-four thousand, nine hundred forty-three".