2556268818 has 16 divisors (see below), whose sum is σ = 5413275360. Its totient is φ = 801966656.

The previous prime is 2556268817. The next prime is 2556268823. The reversal of 2556268818 is 8188626552.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (2556268817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12530628 + ... + 12530831.

It is an arithmetic number, because the mean of its divisors is an integer number (338329710).

Almost surely, 2^2556268818 is an apocalyptic number.

2556268818 is an abundant number, since it is smaller than the sum of its proper divisors (2857006542).

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

2556268818 is a wasteful number, since it uses less digits than its factorization.

2556268818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25061481.

The product of its digits is 1843200, while the sum is 51.

The square root of 2556268818 is about 50559.5571380921. The cubic root of 2556268818 is about 1367.3158267477.

The spelling of 2556268818 in words is "two billion, five hundred fifty-six million, two hundred sixty-eight thousand, eight hundred eighteen".