561798461 has 16 divisors (see below), whose sum is σ = 669355008. Its totient is φ = 461376000.

The previous prime is 561798451. The next prime is 561798487. The reversal of 561798461 is 164897165.

It is a cyclic number.

It is not a de Polignac number, because 561798461 - 2¹⁰ = 561797437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561798401) 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 15 ways as a sum of consecutive naturals, for example, 9101 + ... + 34733.

It is an arithmetic number, because the mean of its divisors is an integer number (41834688).

Almost surely, 2^561798461 is an apocalyptic number.

It is an amenable number.

561798461 is a deficient number, since it is larger than the sum of its proper divisors (107556547).

561798461 is a wasteful number, since it uses less digits than its factorization.

561798461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25772.

The product of its digits is 362880, while the sum is 47.

The square root of 561798461 is about 23702.2880962999. The cubic root of 561798461 is about 825.1384945332.

The spelling of 561798461 in words is "five hundred sixty-one million, seven hundred ninety-eight thousand, four hundred sixty-one".