6880640256 has 504 divisors, whose sum is σ = 24664375680. Its totient is φ = 1872211968.

The previous prime is 6880640237. The next prime is 6880640281. The reversal of 6880640256 is 6520460886.

It is a tau number, because it is divible by the number of its divisors (504).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 30046350 + ... + 30046578.

Almost surely, 2^6880640256 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 6880640256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12332187840).

6880640256 is an abundant number, since it is smaller than the sum of its proper divisors (17783735424).

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

6880640256 is an equidigital number, since it uses as much as digits as its factorization.

6880640256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 6880640256 is about 82949.6248092781. The cubic root of 6880640256 is about 1901.9960791648.

The spelling of 6880640256 in words is "six billion, eight hundred eighty million, six hundred forty thousand, two hundred fifty-six".