2557798459 has 2 divisors, whose sum is σ = 2557798460. Its totient is φ = 2557798458.

The previous prime is 2557798457. The next prime is 2557798531. The reversal of 2557798459 is 9548977552.

2557798459 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 not a de Polignac number, because 2557798459 - 2¹ = 2557798457 is a prime.

Together with 2557798457, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2557798397 and 2557798406.

It is not a weakly prime, because it can be changed into another prime (2557798457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278899229 + 1278899230.

It is an arithmetic number, because the mean of its divisors is an integer number (1278899230).

Almost surely, 2^2557798459 is an apocalyptic number.

2557798459 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557798459 is an equidigital number, since it uses as much as digits as its factorization.

2557798459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752000, while the sum is 61.

The square root of 2557798459 is about 50574.6819960343. The cubic root of 2557798459 is about 1367.5885009015.

The spelling of 2557798459 in words is "two billion, five hundred fifty-seven million, seven hundred ninety-eight thousand, four hundred fifty-nine".