2543440591 has 2 divisors, whose sum is σ = 2543440592. Its totient is φ = 2543440590.

The previous prime is 2543440577. The next prime is 2543440607. The reversal of 2543440591 is 1950443452.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2543440591 - 2²³ = 2535051983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2543440591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2543440541) 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 as a sum of consecutive naturals, namely, 1271720295 + 1271720296.

It is an arithmetic number, because the mean of its divisors is an integer number (1271720296).

Almost surely, 2^2543440591 is an apocalyptic number.

2543440591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543440591 is an equidigital number, since it uses as much as digits as its factorization.

2543440591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 2543440591 is about 50432.5350443541. The cubic root of 2543440591 is about 1365.0247712948.

The spelling of 2543440591 in words is "two billion, five hundred forty-three million, four hundred forty thousand, five hundred ninety-one".