23505536543 has 4 divisors (see below), whose sum is σ = 23747861760. Its totient is φ = 23263211328.

The previous prime is 23505536531. The next prime is 23505536563. The reversal of 23505536543 is 34563550532.

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 23505536543 - 2⁶ = 23505536479 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 23505536543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23505536563) 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, 121162463 + ... + 121162656.

It is an arithmetic number, because the mean of its divisors is an integer number (5936965440).

Almost surely, 2^23505536543 is an apocalyptic number.

23505536543 is a deficient number, since it is larger than the sum of its proper divisors (242325217).

23505536543 is an equidigital number, since it uses as much as digits as its factorization.

23505536543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242325216.

The product of its (nonzero) digits is 810000, while the sum is 41.

The spelling of 23505536543 in words is "twenty-three billion, five hundred five million, five hundred thirty-six thousand, five hundred forty-three".