2543556679 has 16 divisors (see below), whose sum is σ = 2649477600. Its totient is φ = 2438926336.

The previous prime is 2543556661. The next prime is 2543556773. The reversal of 2543556679 is 9766553452.

It is a cyclic number.

It is not a de Polignac number, because 2543556679 - 2⁷ = 2543556551 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 (2543556649) 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, 4289007 + ... + 4289599.

It is an arithmetic number, because the mean of its divisors is an integer number (165592350).

Almost surely, 2^2543556679 is an apocalyptic number.

2543556679 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2543556679 is a deficient number, since it is larger than the sum of its proper divisors (105920921).

2543556679 is a wasteful number, since it uses less digits than its factorization.

2543556679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394.

The product of its digits is 6804000, while the sum is 52.

The square root of 2543556679 is about 50433.6859549250. The cubic root of 2543556679 is about 1365.0455385166.

The spelling of 2543556679 in words is "two billion, five hundred forty-three million, five hundred fifty-six thousand, six hundred seventy-nine".