2543223566623 has 4 divisors (see below), whose sum is σ = 2543433606280. Its totient is φ = 2543013526968.

The previous prime is 2543223566593. The next prime is 2543223566629. The reversal of 2543223566623 is 3266653223452.

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 2543223566623 - 2³³ = 2534633632031 is a prime.

It is a super-2 number, since 2×2543223566623² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543223566629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105001665 + ... + 105025882.

It is an arithmetic number, because the mean of its divisors is an integer number (635858401570).

Almost surely, 2^{2543223566623} is an apocalyptic number.

2543223566623 is a deficient number, since it is larger than the sum of its proper divisors (210039657).

2543223566623 is a wasteful number, since it uses less digits than its factorization.

2543223566623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210039656.

The product of its digits is 9331200, while the sum is 49.

The spelling of 2543223566623 in words is "two trillion, five hundred forty-three billion, two hundred twenty-three million, five hundred sixty-six thousand, six hundred twenty-three".