4440341555561 has 2 divisors, whose sum is σ = 4440341555562. Its totient is φ = 4440341555560.

The previous prime is 4440341555521. The next prime is 4440341555579. The reversal of 4440341555561 is 1655551430444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2292592685161 + 2147748870400 = 1514131^2 + 1465520^2 .

It is a cyclic number.

It is not a de Polignac number, because 4440341555561 - 2²⁶ = 4440274446697 is a prime.

It is not a weakly prime, because it can be changed into another prime (4440341555521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2220170777780 + 2220170777781.

It is an arithmetic number, because the mean of its divisors is an integer number (2220170777781).

Almost surely, 2^{4440341555561} is an apocalyptic number.

It is an amenable number.

4440341555561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4440341555561 is an equidigital number, since it uses as much as digits as its factorization.

4440341555561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880000, while the sum is 47.

The spelling of 4440341555561 in words is "four trillion, four hundred forty billion, three hundred forty-one million, five hundred fifty-five thousand, five hundred sixty-one".