1806533562973 has 2 divisors, whose sum is σ = 1806533562974. Its totient is φ = 1806533562972.

The previous prime is 1806533562893. The next prime is 1806533563007. The reversal of 1806533562973 is 3792653356081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1300197428644 + 506336134329 = 1140262^2 + 711573^2 .

It is an emirp because it is prime and its reverse (3792653356081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1806533562973 - 2⁹ = 1806533562461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1806533562073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 903266781486 + 903266781487.

It is an arithmetic number, because the mean of its divisors is an integer number (903266781487).

Almost surely, 2^{1806533562973} is an apocalyptic number.

It is an amenable number.

1806533562973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1806533562973 is an equidigital number, since it uses as much as digits as its factorization.

1806533562973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24494400, while the sum is 58.

The spelling of 1806533562973 in words is "one trillion, eight hundred six billion, five hundred thirty-three million, five hundred sixty-two thousand, nine hundred seventy-three".