544366636661 has 2 divisors, whose sum is σ = 544366636662. Its totient is φ = 544366636660.

The previous prime is 544366636633. The next prime is 544366636729. The reversal of 544366636661 is 166636663445.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 533447640625 + 10918996036 = 730375^2 + 104494^2 .

It is a cyclic number.

It is not a de Polignac number, because 544366636661 - 2³⁸ = 269488729717 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 = 544366636597 and 544366636606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (544366636621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272183318330 + 272183318331.

It is an arithmetic number, because the mean of its divisors is an integer number (272183318331).

Almost surely, 2^544366636661 is an apocalyptic number.

It is an amenable number.

544366636661 is a deficient number, since it is larger than the sum of its proper divisors (1).

544366636661 is an equidigital number, since it uses as much as digits as its factorization.

544366636661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33592320, while the sum is 56.

The spelling of 544366636661 in words is "five hundred forty-four billion, three hundred sixty-six million, six hundred thirty-six thousand, six hundred sixty-one".