556185649 has 2 divisors, whose sum is σ = 556185650. Its totient is φ = 556185648.

The previous prime is 556185631. The next prime is 556185659. The reversal of 556185649 is 946581655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 475545249 + 80640400 = 21807^2 + 8980^2 .

It is a cyclic number.

It is not a de Polignac number, because 556185649 - 2¹¹ = 556183601 is a prime.

It is not a weakly prime, because it can be changed into another prime (556185659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278092824 + 278092825.

It is an arithmetic number, because the mean of its divisors is an integer number (278092825).

Almost surely, 2^556185649 is an apocalyptic number.

It is an amenable number.

556185649 is a deficient number, since it is larger than the sum of its proper divisors (1).

556185649 is an equidigital number, since it uses as much as digits as its factorization.

556185649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296000, while the sum is 49.

The square root of 556185649 is about 23583.5885522115. The cubic root of 556185649 is about 822.3813628340.

The spelling of 556185649 in words is "five hundred fifty-six million, one hundred eighty-five thousand, six hundred forty-nine".