561843394321 has 8 divisors (see below), whose sum is σ = 634055241600. Its totient is φ = 493154076240.

The previous prime is 561843394289. The next prime is 561843394367. The reversal of 561843394321 is 123493348165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561843394321 - 2⁵ = 561843394289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561843394921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 880631961 + ... + 880632598.

It is an arithmetic number, because the mean of its divisors is an integer number (79256905200).

Almost surely, 2^561843394321 is an apocalyptic number.

It is an amenable number.

561843394321 is a deficient number, since it is larger than the sum of its proper divisors (72211847279).

561843394321 is a wasteful number, since it uses less digits than its factorization.

561843394321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761264599.

The product of its digits is 1866240, while the sum is 49.

The spelling of 561843394321 in words is "five hundred sixty-one billion, eight hundred forty-three million, three hundred ninety-four thousand, three hundred twenty-one".