11543215423 has 4 divisors (see below), whose sum is σ = 11607702840. Its totient is φ = 11478728008.

The previous prime is 11543215393. The next prime is 11543215433. The reversal of 11543215423 is 32451234511.

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 11543215423 - 2²⁹ = 11006344511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11543215433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32243440 + ... + 32243797.

It is an arithmetic number, because the mean of its divisors is an integer number (2901925710).

Almost surely, 2^11543215423 is an apocalyptic number.

11543215423 is a deficient number, since it is larger than the sum of its proper divisors (64487417).

11543215423 is an equidigital number, since it uses as much as digits as its factorization.

11543215423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64487416.

The product of its digits is 14400, while the sum is 31.

Adding to 11543215423 its reverse (32451234511), we get a palindrome (43994449934).

The spelling of 11543215423 in words is "eleven billion, five hundred forty-three million, two hundred fifteen thousand, four hundred twenty-three".