2565555652 has 48 divisors (see below), whose sum is σ = 5016211200. Its totient is φ = 1138325760.

The previous prime is 2565555649. The next prime is 2565555653.

It is a happy number.

2565555652 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (2565555653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305218 + ... + 313510.

It is an arithmetic number, because the mean of its divisors is an integer number (104504400).

Almost surely, 2^2565555652 is an apocalyptic number.

2565555652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2565555652 is a deficient number, since it is larger than the sum of its proper divisors (2450655548).

2565555652 is a wasteful number, since it uses less digits than its factorization.

2565555652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8476 (or 8474 counting only the distinct ones).

The product of its digits is 2250000, while the sum is 46.

The square root of 2565555652 is about 50651.3144153239. The cubic root of 2565555652 is about 1368.9696289365.

The spelling of 2565555652 in words is "two billion, five hundred sixty-five million, five hundred fifty-five thousand, six hundred fifty-two".