1805085870853 has 2 divisors, whose sum is σ = 1805085870854. Its totient is φ = 1805085870852.

The previous prime is 1805085870811. The next prime is 1805085870919. The reversal of 1805085870853 is 3580785805081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1110785307844 + 694300563009 = 1053938^2 + 833247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1805085870853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1805085870053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902542935426 + 902542935427.

It is an arithmetic number, because the mean of its divisors is an integer number (902542935427).

Almost surely, 2^{1805085870853} is an apocalyptic number.

It is an amenable number.

1805085870853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1805085870853 is an equidigital number, since it uses as much as digits as its factorization.

1805085870853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752000, while the sum is 58.

The spelling of 1805085870853 in words is "one trillion, eight hundred five billion, eighty-five million, eight hundred seventy thousand, eight hundred fifty-three".