11543205623 has 4 divisors (see below), whose sum is σ = 11578079688. Its totient is φ = 11508331560.

The previous prime is 11543205613. The next prime is 11543205637. The reversal of 11543205623 is 32650234511.

It is a happy number.

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 11543205623 - 2⁸ = 11543205367 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 11543205623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11543205613) 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, 17436536 + ... + 17437197.

It is an arithmetic number, because the mean of its divisors is an integer number (2894519922).

Almost surely, 2^11543205623 is an apocalyptic number.

11543205623 is a deficient number, since it is larger than the sum of its proper divisors (34874065).

11543205623 is an equidigital number, since it uses as much as digits as its factorization.

11543205623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34874064.

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

The spelling of 11543205623 in words is "eleven billion, five hundred forty-three million, two hundred five thousand, six hundred twenty-three".