11155243439 has 2 divisors, whose sum is σ = 11155243440. Its totient is φ = 11155243438.

The previous prime is 11155243433. The next prime is 11155243441. The reversal of 11155243439 is 93434255111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11155243439 - 2¹² = 11155239343 is a prime.

It is a Sophie Germain prime.

Together with 11155243441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11155243433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5577621719 + 5577621720.

It is an arithmetic number, because the mean of its divisors is an integer number (5577621720).

Almost surely, 2^11155243439 is an apocalyptic number.

11155243439 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155243439 is an equidigital number, since it uses as much as digits as its factorization.

11155243439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The spelling of 11155243439 in words is "eleven billion, one hundred fifty-five million, two hundred forty-three thousand, four hundred thirty-nine".