606638561 has 2 divisors, whose sum is σ = 606638562. Its totient is φ = 606638560.

The previous prime is 606638537. The next prime is 606638609. The reversal of 606638561 is 165836606.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 546110161 + 60528400 = 23369^2 + 7780^2 .

It is a cyclic number.

It is not a de Polignac number, because 606638561 - 2⁶ = 606638497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (606638521) 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, 303319280 + 303319281.

It is an arithmetic number, because the mean of its divisors is an integer number (303319281).

Almost surely, 2^606638561 is an apocalyptic number.

It is an amenable number.

606638561 is a deficient number, since it is larger than the sum of its proper divisors (1).

606638561 is an equidigital number, since it uses as much as digits as its factorization.

606638561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 606638561 is about 24630.0337190187. The cubic root of 606638561 is about 846.5319180401.

The spelling of 606638561 in words is "six hundred six million, six hundred thirty-eight thousand, five hundred sixty-one".