2556958881 has 16 divisors (see below), whose sum is σ = 3421440000. Its totient is φ = 1698571728.

The previous prime is 2556958879. The next prime is 2556958883. The reversal of 2556958881 is 1888596552.

It is an interprime number because it is at equal distance from previous prime (2556958879) and next prime (2556958883).

It is not a de Polignac number, because 2556958881 - 2¹ = 2556958879 is a prime.

It is a super-2 number, since 2×2556958881² = 13076077438249544322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2556958883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1278120 + ... + 1280118.

It is an arithmetic number, because the mean of its divisors is an integer number (213840000).

Almost surely, 2^2556958881 is an apocalyptic number.

It is an amenable number.

2556958881 is a deficient number, since it is larger than the sum of its proper divisors (864481119).

2556958881 is a wasteful number, since it uses less digits than its factorization.

2556958881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308.

The product of its digits is 6912000, while the sum is 57.

The square root of 2556958881 is about 50566.3809363494. The cubic root of 2556958881 is about 1367.4388509989.

The spelling of 2556958881 in words is "two billion, five hundred fifty-six million, nine hundred fifty-eight thousand, eight hundred eighty-one".