556255649 has 2 divisors, whose sum is σ = 556255650. Its totient is φ = 556255648.

The previous prime is 556255639. The next prime is 556255681. The reversal of 556255649 is 946552655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 540795025 + 15460624 = 23255^2 + 3932^2 .

It is a cyclic number.

It is not a de Polignac number, because 556255649 - 2¹⁶ = 556190113 is a prime.

It is a super-2 number, since 2×556255649² = 618840694088822402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (556255639) 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, 278127824 + 278127825.

It is an arithmetic number, because the mean of its divisors is an integer number (278127825).

Almost surely, 2^556255649 is an apocalyptic number.

It is an amenable number.

556255649 is a deficient number, since it is larger than the sum of its proper divisors (1).

556255649 is an equidigital number, since it uses as much as digits as its factorization.

556255649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620000, while the sum is 47.

The square root of 556255649 is about 23585.0725883979. The cubic root of 556255649 is about 822.4158622741.

The spelling of 556255649 in words is "five hundred fifty-six million, two hundred fifty-five thousand, six hundred forty-nine".