2605659885 has 24 divisors (see below), whose sum is σ = 4580095104. Its totient is φ = 1370110560.

The previous prime is 2605659877. The next prime is 2605659899. The reversal of 2605659885 is 5889565062.

It is not a de Polignac number, because 2605659885 - 2³ = 2605659877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404577 + ... + 410966.

It is an arithmetic number, because the mean of its divisors is an integer number (190837296).

Almost surely, 2^2605659885 is an apocalyptic number.

It is an amenable number.

2605659885 is a deficient number, since it is larger than the sum of its proper divisors (1974435219).

2605659885 is a wasteful number, since it uses less digits than its factorization.

2605659885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815625 (or 815622 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 54.

The square root of 2605659885 is about 51045.6647032831. The cubic root of 2605659885 is about 1376.0659300382.

The spelling of 2605659885 in words is "two billion, six hundred five million, six hundred fifty-nine thousand, eight hundred eighty-five".