561413909 has 12 divisors (see below), whose sum is σ = 650007456. Its totient is φ = 474930552.

The previous prime is 561413803. The next prime is 561413917. The reversal of 561413909 is 909314165.

It is not a de Polignac number, because 561413909 - 2²⁴ = 544636693 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561412909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 570632 + ... + 571614.

It is an arithmetic number, because the mean of its divisors is an integer number (54167288).

Almost surely, 2^561413909 is an apocalyptic number.

It is an amenable number.

561413909 is a deficient number, since it is larger than the sum of its proper divisors (88593547).

561413909 is an frugal number, since it uses more digits than its factorization.

561413909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 561413909 is about 23694.1745794193. The cubic root of 561413909 is about 824.9501819933.

The spelling of 561413909 in words is "five hundred sixty-one million, four hundred thirteen thousand, nine hundred nine".