2605540543 has 2 divisors, whose sum is σ = 2605540544. Its totient is φ = 2605540542.

The previous prime is 2605540523. The next prime is 2605540549. The reversal of 2605540543 is 3450455062.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2605540543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2605540499 and 2605540508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2605540549) 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, 1302770271 + 1302770272.

It is an arithmetic number, because the mean of its divisors is an integer number (1302770272).

Almost surely, 2^2605540543 is an apocalyptic number.

2605540543 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605540543 is an equidigital number, since it uses as much as digits as its factorization.

2605540543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72000, while the sum is 34.

The square root of 2605540543 is about 51044.4957169723. The cubic root of 2605540543 is about 1376.0449212887.

The spelling of 2605540543 in words is "two billion, six hundred five million, five hundred forty thousand, five hundred forty-three".