556782491 has 2 divisors, whose sum is σ = 556782492. Its totient is φ = 556782490.

The previous prime is 556782481. The next prime is 556782493. The reversal of 556782491 is 194287655.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 556782491 - 2⁶ = 556782427 is a prime.

Together with 556782493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (556782493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278391245 + 278391246.

It is an arithmetic number, because the mean of its divisors is an integer number (278391246).

Almost surely, 2^556782491 is an apocalyptic number.

556782491 is a deficient number, since it is larger than the sum of its proper divisors (1).

556782491 is an equidigital number, since it uses as much as digits as its factorization.

556782491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 47.

The square root of 556782491 is about 23596.2389164036. The cubic root of 556782491 is about 822.6754230832.

The spelling of 556782491 in words is "five hundred fifty-six million, seven hundred eighty-two thousand, four hundred ninety-one".