2556488887 has 2 divisors, whose sum is σ = 2556488888. Its totient is φ = 2556488886.

The previous prime is 2556488861. The next prime is 2556488923. The reversal of 2556488887 is 7888846552.

2556488887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2556488887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2556488827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278244443 + 1278244444.

It is an arithmetic number, because the mean of its divisors is an integer number (1278244444).

Almost surely, 2^2556488887 is an apocalyptic number.

2556488887 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556488887 is an equidigital number, since it uses as much as digits as its factorization.

2556488887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34406400, while the sum is 61.

The square root of 2556488887 is about 50561.7334255858. The cubic root of 2556488887 is about 1367.3550629957.

The spelling of 2556488887 in words is "two billion, five hundred fifty-six million, four hundred eighty-eight thousand, eight hundred eighty-seven".