2555661328 has 120 divisors (see below), whose sum is σ = 5689080320. Its totient is φ = 1110067200.

The previous prime is 2555661313. The next prime is 2555661341. The reversal of 2555661328 is 8231665552.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5821333 + ... + 5821771.

Almost surely, 2^2555661328 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 2555661328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2844540160).

2555661328 is an abundant number, since it is smaller than the sum of its proper divisors (3133418992).

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

2555661328 is a wasteful number, since it uses less digits than its factorization.

2555661328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597 (or 580 counting only the distinct ones).

The product of its digits is 432000, while the sum is 43.

The square root of 2555661328 is about 50553.5491137863. The cubic root of 2555661328 is about 1367.2075052632.

The spelling of 2555661328 in words is "two billion, five hundred fifty-five million, six hundred sixty-one thousand, three hundred twenty-eight".