2556988180 has 48 divisors (see below), whose sum is σ = 5478172560. Its totient is φ = 1002180608.

The previous prime is 2556988171. The next prime is 2556988183. The reversal of 2556988180 is 818896552.

It can be written as a sum of positive squares in 8 ways, for example, as 33131536 + 2523856644 = 5756^2 + 50238^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556988183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1352676 + ... + 1354564.

It is an arithmetic number, because the mean of its divisors is an integer number (114128595).

Almost surely, 2^2556988180 is an apocalyptic number.

2556988180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2556988180 is an abundant number, since it is smaller than the sum of its proper divisors (2921184380).

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

2556988180 is a wasteful number, since it uses less digits than its factorization.

2556988180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3228 (or 3226 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 52.

The square root of 2556988180 is about 50566.6706438144. The cubic root of 2556988180 is about 1367.4440739271. Note that the first 3 decimals are identical.

The spelling of 2556988180 in words is "two billion, five hundred fifty-six million, nine hundred eighty-eight thousand, one hundred eighty".