555561659 has 2 divisors, whose sum is σ = 555561660. Its totient is φ = 555561658.

The previous prime is 555561593. The next prime is 555561661. The reversal of 555561659 is 956165555.

555561659 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-555561659 is a prime.

It is a Sophie Germain prime.

Together with 555561661, 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 (555561679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277780829 + 277780830.

It is an arithmetic number, because the mean of its divisors is an integer number (277780830).

Almost surely, 2^555561659 is an apocalyptic number.

555561659 is a deficient number, since it is larger than the sum of its proper divisors (1).

555561659 is an equidigital number, since it uses as much as digits as its factorization.

555561659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1012500, while the sum is 47.

The square root of 555561659 is about 23570.3555128046. The cubic root of 555561659 is about 822.0737019101.

The spelling of 555561659 in words is "five hundred fifty-five million, five hundred sixty-one thousand, six hundred fifty-nine".