111505423055 has 16 divisors (see below), whose sum is σ = 146461605024. Its totient is φ = 80992586880.

The previous prime is 111505423031. The next prime is 111505423093. The reversal of 111505423055 is 550324505111.

It is not a de Polignac number, because 111505423055 - 2¹⁰ = 111505422031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14057249 + ... + 14065178.

It is an arithmetic number, because the mean of its divisors is an integer number (9153850314).

Almost surely, 2^111505423055 is an apocalyptic number.

111505423055 is a deficient number, since it is larger than the sum of its proper divisors (34956181969).

111505423055 is a wasteful number, since it uses less digits than its factorization.

111505423055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28122506.

The product of its (nonzero) digits is 15000, while the sum is 32.

Adding to 111505423055 its reverse (550324505111), we get a palindrome (661829928166).

The spelling of 111505423055 in words is "one hundred eleven billion, five hundred five million, four hundred twenty-three thousand, fifty-five".