560645681 has 2 divisors, whose sum is σ = 560645682. Its totient is φ = 560645680.

The previous prime is 560645663. The next prime is 560645717. The reversal of 560645681 is 186546065.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 339112225 + 221533456 = 18415^2 + 14884^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-560645681 is a prime.

It is a super-2 number, since 2×560645681² = 628647159247907522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (560645641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280322840 + 280322841.

It is an arithmetic number, because the mean of its divisors is an integer number (280322841).

Almost surely, 2^560645681 is an apocalyptic number.

It is an amenable number.

560645681 is a deficient number, since it is larger than the sum of its proper divisors (1).

560645681 is an equidigital number, since it uses as much as digits as its factorization.

560645681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 560645681 is about 23677.9577033155. The cubic root of 560645681 is about 824.5737282405.

The spelling of 560645681 in words is "five hundred sixty million, six hundred forty-five thousand, six hundred eighty-one".