561371067009 has 9 divisors (see below), whose sum is σ = 810872565763. Its totient is φ = 374245879512.

The previous prime is 561371067001. The next prime is 561371067011. The reversal of 561371067009 is 900760173165.

The square root of 561371067009 is 749247.

It is a perfect power (a square), and thus also a powerful number.

561371067009 is a `hidden beast` number, since 561 + 3 + 7 + 10 + 6 + 70 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 59852154609 + 501518912400 = 244647^2 + 708180^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 561371067009 - 2³ = 561371067001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561371067001) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2122867 + ... + 2372615.

Almost surely, 2^561371067009 is an apocalyptic number.

561371067009 is the 749247-th square number.

561371067009 is the 374624-th centered octagonal number.

It is an amenable number.

561371067009 is a deficient number, since it is larger than the sum of its proper divisors (249501498754).

561371067009 is an frugal number, since it uses more digits than its factorization.

561371067009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499504 (or 249752 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The spelling of 561371067009 in words is "five hundred sixty-one billion, three hundred seventy-one million, sixty-seven thousand, nine".