1806213983599 has 2 divisors, whose sum is σ = 1806213983600. Its totient is φ = 1806213983598.

The previous prime is 1806213983573. The next prime is 1806213983633. The reversal of 1806213983599 is 9953893126081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1806213983599 - 2¹⁹ = 1806213459311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1806213983599.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1806213983999) 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, 903106991799 + 903106991800.

It is an arithmetic number, because the mean of its divisors is an integer number (903106991800).

Almost surely, 2^{1806213983599} is an apocalyptic number.

1806213983599 is a deficient number, since it is larger than the sum of its proper divisors (1).

1806213983599 is an equidigital number, since it uses as much as digits as its factorization.

1806213983599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25194240, while the sum is 64.

The spelling of 1806213983599 in words is "one trillion, eight hundred six billion, two hundred thirteen million, nine hundred eighty-three thousand, five hundred ninety-nine".