557168641 has 2 divisors, whose sum is σ = 557168642. Its totient is φ = 557168640.

The previous prime is 557168609. The next prime is 557168669. The reversal of 557168641 is 146861755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 552438016 + 4730625 = 23504^2 + 2175^2 .

It is a cyclic number.

It is not a de Polignac number, because 557168641 - 2⁵ = 557168609 is a prime.

It is not a weakly prime, because it can be changed into another prime (557168041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278584320 + 278584321.

It is an arithmetic number, because the mean of its divisors is an integer number (278584321).

Almost surely, 2^557168641 is an apocalyptic number.

It is an amenable number.

557168641 is a deficient number, since it is larger than the sum of its proper divisors (1).

557168641 is an equidigital number, since it uses as much as digits as its factorization.

557168641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 43.

The square root of 557168641 is about 23604.4199462728. The cubic root of 557168641 is about 822.8655647800.

The spelling of 557168641 in words is "five hundred fifty-seven million, one hundred sixty-eight thousand, six hundred forty-one".