11438942161 has 2 divisors, whose sum is σ = 11438942162. Its totient is φ = 11438942160.

The previous prime is 11438942159. The next prime is 11438942213. The reversal of 11438942161 is 16124983411.

It is a happy number.

11438942161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8571982225 + 2866959936 = 92585^2 + 53544^2 .

It is a cyclic number.

It is not a de Polignac number, because 11438942161 - 2¹ = 11438942159 is a prime.

Together with 11438942159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11438942111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5719471080 + 5719471081.

It is an arithmetic number, because the mean of its divisors is an integer number (5719471081).

Almost surely, 2^11438942161 is an apocalyptic number.

It is an amenable number.

11438942161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11438942161 is an equidigital number, since it uses as much as digits as its factorization.

11438942161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 40.

The spelling of 11438942161 in words is "eleven billion, four hundred thirty-eight million, nine hundred forty-two thousand, one hundred sixty-one".