561688287349 has 16 divisors (see below), whose sum is σ = 644801886720. Its totient is φ = 479293246080.

The previous prime is 561688287343. The next prime is 561688287353. The reversal of 561688287349 is 943782886165.

It is a cyclic number.

It is not a de Polignac number, because 561688287349 - 2³⁷ = 424249333877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561688287343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27149289 + ... + 27169969.

It is an arithmetic number, because the mean of its divisors is an integer number (40300117920).

Almost surely, 2^561688287349 is an apocalyptic number.

It is an amenable number.

561688287349 is a deficient number, since it is larger than the sum of its proper divisors (83113599371).

561688287349 is a wasteful number, since it uses less digits than its factorization.

561688287349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37860.

The product of its digits is 139345920, while the sum is 67.

The spelling of 561688287349 in words is "five hundred sixty-one billion, six hundred eighty-eight million, two hundred eighty-seven thousand, three hundred forty-nine".