2605261653 has 12 divisors (see below), whose sum is σ = 3843223488. Its totient is φ = 1699886760.

The previous prime is 2605261621. The next prime is 2605261751. The reversal of 2605261653 is 3561625062.

It is a happy number.

It is not a de Polignac number, because 2605261653 - 2⁵ = 2605261621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605261453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3079083 + ... + 3079928.

It is an arithmetic number, because the mean of its divisors is an integer number (320268624).

Almost surely, 2^2605261653 is an apocalyptic number.

It is an amenable number.

2605261653 is a deficient number, since it is larger than the sum of its proper divisors (1237961835).

2605261653 is a wasteful number, since it uses less digits than its factorization.

2605261653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6159064 (or 6159061 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 2605261653 is about 51041.7638116082. The cubic root of 2605261653 is about 1375.9958234969.

The spelling of 2605261653 in words is "two billion, six hundred five million, two hundred sixty-one thousand, six hundred fifty-three".