809858411543 has 2 divisors, whose sum is σ = 809858411544. Its totient is φ = 809858411542.

The previous prime is 809858411441. The next prime is 809858411563. The reversal of 809858411543 is 345114858908.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 809858411543 - 2¹² = 809858407447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809858411563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404929205771 + 404929205772.

It is an arithmetic number, because the mean of its divisors is an integer number (404929205772).

Almost surely, 2^809858411543 is an apocalyptic number.

809858411543 is a deficient number, since it is larger than the sum of its proper divisors (1).

809858411543 is an equidigital number, since it uses as much as digits as its factorization.

809858411543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5529600, while the sum is 56.

The spelling of 809858411543 in words is "eight hundred nine billion, eight hundred fifty-eight million, four hundred eleven thousand, five hundred forty-three".