1808538243011 has 2 divisors, whose sum is σ = 1808538243012. Its totient is φ = 1808538243010.

The previous prime is 1808538242971. The next prime is 1808538243053. The reversal of 1808538243011 is 1103428358081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1808538243011 - 2¹⁰ = 1808538241987 is a prime.

It is a super-3 number, since 3×1808538243011³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1808538242011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 904269121505 + 904269121506.

It is an arithmetic number, because the mean of its divisors is an integer number (904269121506).

Almost surely, 2^{1808538243011} is an apocalyptic number.

1808538243011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1808538243011 is an equidigital number, since it uses as much as digits as its factorization.

1808538243011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 44.

The spelling of 1808538243011 in words is "one trillion, eight hundred eight billion, five hundred thirty-eight million, two hundred forty-three thousand, eleven".