2556488880 has 240 divisors, whose sum is σ = 9526533120. Its totient is φ = 609139200.

The previous prime is 2556488861. The next prime is 2556488887. The reversal of 2556488880 is 888846552.

It is a happy number.

2556488880 is a `hidden beast` number, since 2 + 556 + 4 + 8 + 8 + 8 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is not an unprimeable number, because it can be changed into a prime (2556488887) 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 47 ways as a sum of consecutive naturals, for example, 464545 + ... + 470015.

It is an arithmetic number, because the mean of its divisors is an integer number (39693888).

Almost surely, 2^2556488880 is an apocalyptic number.

2556488880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2556488880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4763266560).

2556488880 is an abundant number, since it is smaller than the sum of its proper divisors (6970044240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2556488880 is a wasteful number, since it uses less digits than its factorization.

2556488880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560 (or 5551 counting only the distinct ones).

The product of its (nonzero) digits is 4915200, while the sum is 54.

The square root of 2556488880 is about 50561.7333563635. The cubic root of 2556488880 is about 1367.3550617477.

The spelling of 2556488880 in words is "two billion, five hundred fifty-six million, four hundred eighty-eight thousand, eight hundred eighty".