1001805818843 has 2 divisors, whose sum is σ = 1001805818844. Its totient is φ = 1001805818842.

The previous prime is 1001805818831. The next prime is 1001805818851. The reversal of 1001805818843 is 3488185081001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001805818843 - 2¹⁶ = 1001805753307 is a prime.

It is a super-2 number, since 2×1001805818843² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1001805818803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500902909421 + 500902909422.

It is an arithmetic number, because the mean of its divisors is an integer number (500902909422).

Almost surely, 2^{1001805818843} is an apocalyptic number.

1001805818843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001805818843 is an equidigital number, since it uses as much as digits as its factorization.

1001805818843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 245760, while the sum is 47.

The spelling of 1001805818843 in words is "one trillion, one billion, eight hundred five million, eight hundred eighteen thousand, eight hundred forty-three".