2544643423 has 4 divisors (see below), whose sum is σ = 2908163920. Its totient is φ = 2181122928.

The previous prime is 2544643399. The next prime is 2544643469. The reversal of 2544643423 is 3243464452.

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 2544643423 - 2²⁵ = 2511088991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2544643523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181760238 + ... + 181760251.

It is an arithmetic number, because the mean of its divisors is an integer number (727040980).

Almost surely, 2^2544643423 is an apocalyptic number.

2544643423 is a deficient number, since it is larger than the sum of its proper divisors (363520497).

2544643423 is an equidigital number, since it uses as much as digits as its factorization.

2544643423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363520496.

The product of its digits is 276480, while the sum is 37.

The square root of 2544643423 is about 50444.4587938061. The cubic root of 2544643423 is about 1365.2399177548.

The spelling of 2544643423 in words is "two billion, five hundred forty-four million, six hundred forty-three thousand, four hundred twenty-three".