23543661111 has 4 divisors (see below), whose sum is σ = 31391548152. Its totient is φ = 15695774072.

The previous prime is 23543661091. The next prime is 23543661161. The reversal of 23543661111 is 11116634532.

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 23543661111 - 2⁹ = 23543660599 is a prime.

It is a super-2 number, since 2×23543661111² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23543661161) 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, 3923943516 + ... + 3923943521.

It is an arithmetic number, because the mean of its divisors is an integer number (7847887038).

Almost surely, 2^23543661111 is an apocalyptic number.

23543661111 is a deficient number, since it is larger than the sum of its proper divisors (7847887041).

23543661111 is an equidigital number, since it uses as much as digits as its factorization.

23543661111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7847887040.

The product of its digits is 12960, while the sum is 33.

The spelling of 23543661111 in words is "twenty-three billion, five hundred forty-three million, six hundred sixty-one thousand, one hundred eleven".