1806985384439 has 2 divisors, whose sum is σ = 1806985384440. Its totient is φ = 1806985384438.

The previous prime is 1806985384429. The next prime is 1806985384489. The reversal of 1806985384439 is 9344835896081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1806985384439 - 2²⁸ = 1806716948983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1806985384429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 903492692219 + 903492692220.

It is an arithmetic number, because the mean of its divisors is an integer number (903492692220).

Almost surely, 2^{1806985384439} is an apocalyptic number.

1806985384439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1806985384439 is an equidigital number, since it uses as much as digits as its factorization.

1806985384439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 179159040, while the sum is 68.

The spelling of 1806985384439 in words is "one trillion, eight hundred six billion, nine hundred eighty-five million, three hundred eighty-four thousand, four hundred thirty-nine".