2556798287 has 2 divisors, whose sum is σ = 2556798288. Its totient is φ = 2556798286.

The previous prime is 2556798271. The next prime is 2556798301. The reversal of 2556798287 is 7828976552.

2556798287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2556798287 - 2⁴ = 2556798271 is a prime.

It is a super-2 number, since 2×2556798287² = 13074434960812268738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2556798227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278399143 + 1278399144.

It is an arithmetic number, because the mean of its divisors is an integer number (1278399144).

Almost surely, 2^2556798287 is an apocalyptic number.

2556798287 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556798287 is an equidigital number, since it uses as much as digits as its factorization.

2556798287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16934400, while the sum is 59.

The square root of 2556798287 is about 50564.7929591331. The cubic root of 2556798287 is about 1367.4102223190.

The spelling of 2556798287 in words is "two billion, five hundred fifty-six million, seven hundred ninety-eight thousand, two hundred eighty-seven".