944501000561 has 2 divisors, whose sum is σ = 944501000562. Its totient is φ = 944501000560.

The previous prime is 944501000507. The next prime is 944501000587. The reversal of 944501000561 is 165000105449.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 943889971600 + 611028961 = 971540^2 + 24719^2 .

It is an emirp because it is prime and its reverse (165000105449) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-944501000561 is a prime.

It is not a weakly prime, because it can be changed into another prime (944501000501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472250500280 + 472250500281.

It is an arithmetic number, because the mean of its divisors is an integer number (472250500281).

Almost surely, 2^944501000561 is an apocalyptic number.

It is an amenable number.

944501000561 is a deficient number, since it is larger than the sum of its proper divisors (1).

944501000561 is an equidigital number, since it uses as much as digits as its factorization.

944501000561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 944501000561 in words is "nine hundred forty-four billion, five hundred one million, five hundred sixty-one", and thus it is an aban number.