556065491 has 2 divisors, whose sum is σ = 556065492. Its totient is φ = 556065490.

The previous prime is 556065479. The next prime is 556065509. The reversal of 556065491 is 194560655.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556065491 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (556065091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278032745 + 278032746.

It is an arithmetic number, because the mean of its divisors is an integer number (278032746).

Almost surely, 2^556065491 is an apocalyptic number.

556065491 is a deficient number, since it is larger than the sum of its proper divisors (1).

556065491 is an equidigital number, since it uses as much as digits as its factorization.

556065491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 556065491 is about 23581.0409227413. The cubic root of 556065491 is about 822.3221363168.

The spelling of 556065491 in words is "five hundred fifty-six million, sixty-five thousand, four hundred ninety-one".