111540136523 has 4 divisors (see below), whose sum is σ = 111542679768. Its totient is φ = 111537593280.

The previous prime is 111540136507. The next prime is 111540136531. The reversal of 111540136523 is 325631045111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325631045111 = 434261 ⋅749851.

It is a cyclic number.

It is not a de Polignac number, because 111540136523 - 2⁴ = 111540136507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111540136523.

It is not an unprimeable number, because it can be changed into a prime (111540136583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204661 + ... + 1293942.

It is an arithmetic number, because the mean of its divisors is an integer number (27885669942).

Almost surely, 2^111540136523 is an apocalyptic number.

111540136523 is a deficient number, since it is larger than the sum of its proper divisors (2543245).

111540136523 is an equidigital number, since it uses as much as digits as its factorization.

111540136523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543244.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 111540136523 in words is "one hundred eleven billion, five hundred forty million, one hundred thirty-six thousand, five hundred twenty-three".