2605745655 has 12 divisors (see below), whose sum is σ = 4516625880. Its totient is φ = 1389730992.

The previous prime is 2605745651. The next prime is 2605745657. The reversal of 2605745655 is 5565475062.

2605745655 is a `hidden beast` number, since 26 + 0 + 574 + 5 + 6 + 55 = 666.

It is not a de Polignac number, because 2605745655 - 2² = 2605745651 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 57905459 = 2605745655 / (2 + 6 + 0 + 5 + 7 + 4 + 5 + 6 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 2605745655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605745651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28952685 + ... + 28952774.

It is an arithmetic number, because the mean of its divisors is an integer number (376385490).

Almost surely, 2^2605745655 is an apocalyptic number.

2605745655 is a deficient number, since it is larger than the sum of its proper divisors (1910880225).

2605745655 is a wasteful number, since it uses less digits than its factorization.

2605745655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57905470 (or 57905467 counting only the distinct ones).

The product of its (nonzero) digits is 1260000, while the sum is 45.

The square root of 2605745655 is about 51046.5048264815. The cubic root of 2605745655 is about 1376.0810284375.

The spelling of 2605745655 in words is "two billion, six hundred five million, seven hundred forty-five thousand, six hundred fifty-five".