2568655 has 4 divisors (see below), whose sum is σ = 3082392. Its totient is φ = 2054920.

The previous prime is 2568653. The next prime is 2568659. The reversal of 2568655 is 5568652.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2568655 - 2¹ = 2568653 is a prime.

It is a d-powerful number, because it can be written as 2¹⁶ + 5⁴ + 6⁶ + 8⁷ + 6⁷ + 5⁴ + 5⁷ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2568653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256861 + ... + 256870.

It is an arithmetic number, because the mean of its divisors is an integer number (770598).

2^2568655 is an apocalyptic number.

2568655 is a deficient number, since it is larger than the sum of its proper divisors (513737).

2568655 is an equidigital number, since it uses as much as digits as its factorization.

2568655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513736.

The product of its digits is 72000, while the sum is 37.

The square root of 2568655 is about 1602.7024053142. The cubic root of 2568655 is about 136.9520673419.

It can be divided in two parts, 2568 and 655, that added together give a palindrome (3223).

The spelling of 2568655 in words is "two million, five hundred sixty-eight thousand, six hundred fifty-five".