562581661 has 2 divisors, whose sum is σ = 562581662. Its totient is φ = 562581660.

The previous prime is 562581653. The next prime is 562581671. The reversal of 562581661 is 166185265.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423577561 + 139004100 = 20581^2 + 11790^2 .

It is a cyclic number.

It is not a de Polignac number, because 562581661 - 2³ = 562581653 is a prime.

It is a super-3 number, since 3×562581661³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (562581601) 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, 281290830 + 281290831.

It is an arithmetic number, because the mean of its divisors is an integer number (281290831).

Almost surely, 2^562581661 is an apocalyptic number.

It is an amenable number.

562581661 is a deficient number, since it is larger than the sum of its proper divisors (1).

562581661 is an equidigital number, since it uses as much as digits as its factorization.

562581661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 40.

The square root of 562581661 is about 23718.8039538253. The cubic root of 562581661 is about 825.5217567620.

The spelling of 562581661 in words is "five hundred sixty-two million, five hundred eighty-one thousand, six hundred sixty-one".