2605259539 has 4 divisors (see below), whose sum is σ = 2610481000. Its totient is φ = 2600038080.

The previous prime is 2605259509. The next prime is 2605259543. The reversal of 2605259539 is 9359525062.

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 2605259539 - 2⁵ = 2605259507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2605259509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2609982 + ... + 2610979.

It is an arithmetic number, because the mean of its divisors is an integer number (652620250).

Almost surely, 2^2605259539 is an apocalyptic number.

2605259539 is a deficient number, since it is larger than the sum of its proper divisors (5221461).

2605259539 is an equidigital number, since it uses as much as digits as its factorization.

2605259539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5221460.

The product of its (nonzero) digits is 729000, while the sum is 46.

The square root of 2605259539 is about 51041.7431030720. The cubic root of 2605259539 is about 1375.9954513199.

It can be divided in two parts, 2605 and 259539, that added together give a 18-th power (262144 = 2¹⁸).

The spelling of 2605259539 in words is "two billion, six hundred five million, two hundred fifty-nine thousand, five hundred thirty-nine".