2555663328 has 144 divisors (see below), whose sum is σ = 7387511040. Its totient is φ = 837973248.

The previous prime is 2555663323. The next prime is 2555663359. The reversal of 2555663328 is 8233665552.

2555663328 is a `hidden beast` number, since 2 + 5 + 5 + 5 + 6 + 633 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555663321) 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 23 ways as a sum of consecutive naturals, for example, 7364851 + ... + 7365197.

It is an arithmetic number, because the mean of its divisors is an integer number (51302160).

Almost surely, 2^2555663328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2555663328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3693755520).

2555663328 is an abundant number, since it is smaller than the sum of its proper divisors (4831847712).

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

2555663328 is a wasteful number, since it uses less digits than its factorization.

2555663328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709 (or 698 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The square root of 2555663328 is about 50553.5688947872. The cubic root of 2555663328 is about 1367.2078619112.

The spelling of 2555663328 in words is "two billion, five hundred fifty-five million, six hundred sixty-three thousand, three hundred twenty-eight".