16543575923 has 4 divisors (see below), whose sum is σ = 18906943920. Its totient is φ = 14180207928.

The previous prime is 16543575883. The next prime is 16543575949. The reversal of 16543575923 is 32957534561.

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 16543575923 - 2⁶ = 16543575859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16543571923) 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, 1181683988 + ... + 1181684001.

It is an arithmetic number, because the mean of its divisors is an integer number (4726735980).

Almost surely, 2^16543575923 is an apocalyptic number.

16543575923 is a deficient number, since it is larger than the sum of its proper divisors (2363367997).

16543575923 is an equidigital number, since it uses as much as digits as its factorization.

16543575923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363367996.

The product of its digits is 3402000, while the sum is 50.

The spelling of 16543575923 in words is "sixteen billion, five hundred forty-three million, five hundred seventy-five thousand, nine hundred twenty-three".