2556380880380 has 96 divisors (see below), whose sum is σ = 5532138259200. Its totient is φ = 991678464000.

The previous prime is 2556380880311. The next prime is 2556380880397. The reversal of 2556380880380 is 830880836552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99763970 + ... + 99789590.

It is an arithmetic number, because the mean of its divisors is an integer number (57626440200).

Almost surely, 2^{2556380880380} is an apocalyptic number.

2556380880380 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 2556380880380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2766069129600).

2556380880380 is an abundant number, since it is smaller than the sum of its proper divisors (2975757378820).

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

2556380880380 is a wasteful number, since it uses less digits than its factorization.

2556380880380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26391 (or 26389 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 56.

The spelling of 2556380880380 in words is "two trillion, five hundred fifty-six billion, three hundred eighty million, eight hundred eighty thousand, three hundred eighty".