564814422436661 has 2 divisors, whose sum is σ = 564814422436662. Its totient is φ = 564814422436660.

The previous prime is 564814422436657. The next prime is 564814422436679. The reversal of 564814422436661 is 166634224418465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395186329938436 + 169628092498225 = 19879294^2 + 13024135^2 .

It is a cyclic number.

It is not a de Polignac number, because 564814422436661 - 2² = 564814422436657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 564814422436594 and 564814422436603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (564814422436601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282407211218330 + 282407211218331.

It is an arithmetic number, because the mean of its divisors is an integer number (282407211218331).

Almost surely, 2^{564814422436661} is an apocalyptic number.

It is an amenable number.

564814422436661 is a deficient number, since it is larger than the sum of its proper divisors (1).

564814422436661 is an equidigital number, since it uses as much as digits as its factorization.

564814422436661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 159252480, while the sum is 62.

The spelling of 564814422436661 in words is "five hundred sixty-four trillion, eight hundred fourteen billion, four hundred twenty-two million, four hundred thirty-six thousand, six hundred sixty-one".