2556738845 has 6 divisors (see below), whose sum is σ = 3068222298. Its totient is φ = 2045300624.

The previous prime is 2556738757. The next prime is 2556738871. The reversal of 2556738845 is 5488376552.

2556738845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 165431044 + 2391307801 = 12862^2 + 48901^2 .

It is not a de Polignac number, because 2556738845 - 2²⁸ = 2288303389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101759 + ... + 124371.

It is an arithmetic number, because the mean of its divisors is an integer number (511370383).

Almost surely, 2^2556738845 is an apocalyptic number.

It is an amenable number.

2556738845 is a deficient number, since it is larger than the sum of its proper divisors (511483453).

2556738845 is an frugal number, since it uses more digits than its factorization.

2556738845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45231 (or 22618 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 53.

The square root of 2556738845 is about 50564.2051752027. The cubic root of 2556738845 is about 1367.3996254423.

The spelling of 2556738845 in words is "two billion, five hundred fifty-six million, seven hundred thirty-eight thousand, eight hundred forty-five".