11155543423 has 2 divisors, whose sum is σ = 11155543424. Its totient is φ = 11155543422.

The previous prime is 11155543417. The next prime is 11155543493. The reversal of 11155543423 is 32434555111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11155543423 - 2⁵ = 11155543391 is a prime.

It is a super-2 number, since 2×11155543423² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11155543493) 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, 5577771711 + 5577771712.

It is an arithmetic number, because the mean of its divisors is an integer number (5577771712).

Almost surely, 2^11155543423 is an apocalyptic number.

11155543423 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155543423 is an equidigital number, since it uses as much as digits as its factorization.

11155543423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 34.

The spelling of 11155543423 in words is "eleven billion, one hundred fifty-five million, five hundred forty-three thousand, four hundred twenty-three".