2556625556 has 12 divisors (see below), whose sum is σ = 4595016468. Its totient is φ = 1243763712.

The previous prime is 2556625553. The next prime is 2556625567. The reversal of 2556625556 is 6555266552.

It can be written as a sum of positive squares in 2 ways, for example, as 2409828100 + 146797456 = 49090^2 + 12116^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2556625556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556625553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8637101 + ... + 8637396.

It is an arithmetic number, because the mean of its divisors is an integer number (382918039).

Almost surely, 2^2556625556 is an apocalyptic number.

It is an amenable number.

2556625556 is a deficient number, since it is larger than the sum of its proper divisors (2038390912).

2556625556 is a wasteful number, since it uses less digits than its factorization.

2556625556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17274538 (or 17274536 counting only the distinct ones).

The product of its digits is 2700000, while the sum is 47.

The square root of 2556625556 is about 50563.0849137985. The cubic root of 2556625556 is about 1367.3794286690.

The spelling of 2556625556 in words is "two billion, five hundred fifty-six million, six hundred twenty-five thousand, five hundred fifty-six".