11235640523 has 4 divisors (see below), whose sum is σ = 11236079400. Its totient is φ = 11235201648.

The previous prime is 11235640499. The next prime is 11235640543. The reversal of 11235640523 is 32504653211.

It is a happy number.

11235640523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11235640523 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 11235640523.

It is not an unprimeable number, because it can be changed into a prime (11235640543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178490 + ... + 233087.

It is an arithmetic number, because the mean of its divisors is an integer number (2809019850).

Almost surely, 2^11235640523 is an apocalyptic number.

11235640523 is a deficient number, since it is larger than the sum of its proper divisors (438877).

11235640523 is an equidigital number, since it uses as much as digits as its factorization.

11235640523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438876.

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 11235640523 in words is "eleven billion, two hundred thirty-five million, six hundred forty thousand, five hundred twenty-three".