11844138209 has 2 divisors, whose sum is σ = 11844138210. Its totient is φ = 11844138208.

The previous prime is 11844138203. The next prime is 11844138253. The reversal of 11844138209 is 90283144811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11046640609 + 797497600 = 105103^2 + 28240^2 .

It is a cyclic number.

It is not a de Polignac number, because 11844138209 - 2¹⁶ = 11844072673 is a prime.

It is not a weakly prime, because it can be changed into another prime (11844138203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5922069104 + 5922069105.

It is an arithmetic number, because the mean of its divisors is an integer number (5922069105).

Almost surely, 2^11844138209 is an apocalyptic number.

It is an amenable number.

11844138209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11844138209 is an equidigital number, since it uses as much as digits as its factorization.

11844138209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 11844138209 in words is "eleven billion, eight hundred forty-four million, one hundred thirty-eight thousand, two hundred nine".