23555432543 has 16 divisors (see below), whose sum is σ = 26115618240. Its totient is φ = 21205811968.

The previous prime is 23555432501. The next prime is 23555432561. The reversal of 23555432543 is 34523455532.

It is a happy number.

It is not a de Polignac number, because 23555432543 - 2¹⁶ = 23555367007 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 23555432543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23555432443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8771 + ... + 217227.

It is an arithmetic number, because the mean of its divisors is an integer number (1632226140).

Almost surely, 2^23555432543 is an apocalyptic number.

23555432543 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

23555432543 is a deficient number, since it is larger than the sum of its proper divisors (2560185697).

23555432543 is an equidigital number, since it uses as much as digits as its factorization.

23555432543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208531 (or 208497 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 41.

The spelling of 23555432543 in words is "twenty-three billion, five hundred fifty-five million, four hundred thirty-two thousand, five hundred forty-three".