23536775891 has 4 divisors (see below), whose sum is σ = 23546680152. Its totient is φ = 23526871632.

The previous prime is 23536775881. The next prime is 23536775903. The reversal of 23536775891 is 19857763532.

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 23536775891 - 2¹⁰ = 23536774867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23536775881) 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, 4948565 + ... + 4953318.

It is an arithmetic number, because the mean of its divisors is an integer number (5886670038).

Almost surely, 2^23536775891 is an apocalyptic number.

23536775891 is a deficient number, since it is larger than the sum of its proper divisors (9904261).

23536775891 is an equidigital number, since it uses as much as digits as its factorization.

23536775891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9904260.

The product of its digits is 9525600, while the sum is 56.

The spelling of 23536775891 in words is "twenty-three billion, five hundred thirty-six million, seven hundred seventy-five thousand, eight hundred ninety-one".