1808403774241 has 2 divisors, whose sum is σ = 1808403774242. Its totient is φ = 1808403774240.

The previous prime is 1808403774239. The next prime is 1808403774283. The reversal of 1808403774241 is 1424773048081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1775462976225 + 32940798016 = 1332465^2 + 181496^2 .

It is a cyclic number.

It is not a de Polignac number, because 1808403774241 - 2¹ = 1808403774239 is a prime.

Together with 1808403774239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1808403774841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 904201887120 + 904201887121.

It is an arithmetic number, because the mean of its divisors is an integer number (904201887121).

Almost surely, 2^{1808403774241} is an apocalyptic number.

It is an amenable number.

1808403774241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1808403774241 is an equidigital number, since it uses as much as digits as its factorization.

1808403774241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1204224, while the sum is 49.

The spelling of 1808403774241 in words is "one trillion, eight hundred eight billion, four hundred three million, seven hundred seventy-four thousand, two hundred forty-one".