1843341851809 has 2 divisors, whose sum is σ = 1843341851810. Its totient is φ = 1843341851808.

The previous prime is 1843341851783. The next prime is 1843341851821. The reversal of 1843341851809 is 9081581433481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1822575600784 + 20766251025 = 1350028^2 + 144105^2 .

It is a cyclic number.

It is not a de Polignac number, because 1843341851809 - 2²⁵ = 1843308297377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1843341851809.

It is not a weakly prime, because it can be changed into another prime (1843341851839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 921670925904 + 921670925905.

It is an arithmetic number, because the mean of its divisors is an integer number (921670925905).

Almost surely, 2^{1843341851809} is an apocalyptic number.

It is an amenable number.

1843341851809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1843341851809 is an equidigital number, since it uses as much as digits as its factorization.

1843341851809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3317760, while the sum is 55.

The spelling of 1843341851809 in words is "one trillion, eight hundred forty-three billion, three hundred forty-one million, eight hundred fifty-one thousand, eight hundred nine".