1805085870811 has 2 divisors, whose sum is σ = 1805085870812. Its totient is φ = 1805085870810.

The previous prime is 1805085870769. The next prime is 1805085870853. The reversal of 1805085870811 is 1180785805081.

It is a balanced prime because it is at equal distance from previous prime (1805085870769) and next prime (1805085870853).

It is an emirp because it is prime and its reverse (1180785805081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1805085870811 - 2¹⁷ = 1805085739739 is a prime.

It is not a weakly prime, because it can be changed into another prime (1805085850811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902542935405 + 902542935406.

It is an arithmetic number, because the mean of its divisors is an integer number (902542935406).

Almost surely, 2^{1805085870811} is an apocalyptic number.

1805085870811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1805085870811 is an equidigital number, since it uses as much as digits as its factorization.

1805085870811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 716800, while the sum is 52.

The spelling of 1805085870811 in words is "one trillion, eight hundred five billion, eighty-five million, eight hundred seventy thousand, eight hundred eleven".