111550123553 has 16 divisors (see below), whose sum is σ = 122262219072. Its totient is φ = 100933800000.

The previous prime is 111550123543. The next prime is 111550123567. The reversal of 111550123553 is 355321055111.

It is not a de Polignac number, because 111550123553 - 2²² = 111545929249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111550123543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4108643 + ... + 4135703.

It is an arithmetic number, because the mean of its divisors is an integer number (7641388692).

Almost surely, 2^111550123553 is an apocalyptic number.

It is an amenable number.

111550123553 is a deficient number, since it is larger than the sum of its proper divisors (10712095519).

111550123553 is a wasteful number, since it uses less digits than its factorization.

111550123553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28816.

The product of its (nonzero) digits is 11250, while the sum is 32.

Adding to 111550123553 its reverse (355321055111), we get a palindrome (466871178664).

The spelling of 111550123553 in words is "one hundred eleven billion, five hundred fifty million, one hundred twenty-three thousand, five hundred fifty-three".