2556808494 has 16 divisors (see below), whose sum is σ = 5118757968. Its totient is φ = 851412672.

The previous prime is 2556808493. The next prime is 2556808543. The reversal of 2556808494 is 4948086552.

It is a happy number.

2556808494 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556808493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207727 + ... + 219690.

It is an arithmetic number, because the mean of its divisors is an integer number (319922373).

Almost surely, 2^2556808494 is an apocalyptic number.

2556808494 is an abundant number, since it is smaller than the sum of its proper divisors (2561949474).

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

2556808494 is a wasteful number, since it uses less digits than its factorization.

2556808494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428419.

The product of its (nonzero) digits is 2764800, while the sum is 51.

The square root of 2556808494 is about 50564.8938889424. The cubic root of 2556808494 is about 1367.4120419303.

The spelling of 2556808494 in words is "two billion, five hundred fifty-six million, eight hundred eight thousand, four hundred ninety-four".