11915436823 has 4 divisors (see below), whose sum is σ = 12006394488. Its totient is φ = 11824479160.

The previous prime is 11915436791. The next prime is 11915436877. The reversal of 11915436823 is 32863451911.

11915436823 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 not a de Polignac number, because 11915436823 - 2⁵ = 11915436791 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 11915436823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11915436223) 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, 45478636 + ... + 45478897.

It is an arithmetic number, because the mean of its divisors is an integer number (3001598622).

Almost surely, 2^11915436823 is an apocalyptic number.

11915436823 is a deficient number, since it is larger than the sum of its proper divisors (90957665).

11915436823 is an equidigital number, since it uses as much as digits as its factorization.

11915436823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90957664.

The product of its digits is 155520, while the sum is 43.

The spelling of 11915436823 in words is "eleven billion, nine hundred fifteen million, four hundred thirty-six thousand, eight hundred twenty-three".