556644841 has 2 divisors, whose sum is σ = 556644842. Its totient is φ = 556644840.

The previous prime is 556644817. The next prime is 556644859. The reversal of 556644841 is 148446655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 547372816 + 9272025 = 23396^2 + 3045^2 .

It is a cyclic number.

It is not a de Polignac number, because 556644841 - 2¹³ = 556636649 is a prime.

It is not a weakly prime, because it can be changed into another prime (556644041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278322420 + 278322421.

It is an arithmetic number, because the mean of its divisors is an integer number (278322421).

Almost surely, 2^556644841 is an apocalyptic number.

It is an amenable number.

556644841 is a deficient number, since it is larger than the sum of its proper divisors (1).

556644841 is an equidigital number, since it uses as much as digits as its factorization.

556644841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 460800, while the sum is 43.

The square root of 556644841 is about 23593.3219577066. The cubic root of 556644841 is about 822.6076224567.

The spelling of 556644841 in words is "five hundred fifty-six million, six hundred forty-four thousand, eight hundred forty-one".