2556503479 has 2 divisors, whose sum is σ = 2556503480. Its totient is φ = 2556503478.

The previous prime is 2556503399. The next prime is 2556503491. The reversal of 2556503479 is 9743056552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2556503479 - 2²⁷ = 2422285751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2556507479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278251739 + 1278251740.

It is an arithmetic number, because the mean of its divisors is an integer number (1278251740).

Almost surely, 2^2556503479 is an apocalyptic number.

2556503479 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556503479 is an equidigital number, since it uses as much as digits as its factorization.

2556503479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134000, while the sum is 46.

The square root of 2556503479 is about 50561.8777242301. The cubic root of 2556503479 is about 1367.3576645335.

The spelling of 2556503479 in words is "two billion, five hundred fifty-six million, five hundred three thousand, four hundred seventy-nine".