2605439845 has 16 divisors (see below), whose sum is σ = 3170119680. Its totient is φ = 2055416704.

The previous prime is 2605439827. The next prime is 2605439867. The reversal of 2605439845 is 5489345062.

It is a cyclic number.

It is not a de Polignac number, because 2605439845 - 2¹⁷ = 2605308773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2605439795 and 2605439804.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 162792 + ... + 178078.

It is an arithmetic number, because the mean of its divisors is an integer number (198132480).

Almost surely, 2^2605439845 is an apocalyptic number.

It is an amenable number.

2605439845 is a deficient number, since it is larger than the sum of its proper divisors (564679835).

2605439845 is a wasteful number, since it uses less digits than its factorization.

2605439845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15764.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The square root of 2605439845 is about 51043.5093327252. The cubic root of 2605439845 is about 1376.0271940962.

The spelling of 2605439845 in words is "two billion, six hundred five million, four hundred thirty-nine thousand, eight hundred forty-five".