561561266622341 has 8 divisors (see below), whose sum is σ = 569796550171800. Its totient is φ = 553340649652992.

The previous prime is 561561266622277. The next prime is 561561266622347. The reversal of 561561266622341 is 143226662165165.

It can be written as a sum of positive squares in 4 ways, for example, as 284921908936900 + 276639357685441 = 16879630^2 + 16632479^2 .

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 561561266622341 - 2⁶ = 561561266622277 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 (561561266622347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3666567890 + ... + 3666721043.

It is an arithmetic number, because the mean of its divisors is an integer number (71224568771475).

Almost surely, 2^{561561266622341} is an apocalyptic number.

It is an amenable number.

561561266622341 is a deficient number, since it is larger than the sum of its proper divisors (8235283549459).

561561266622341 is a wasteful number, since it uses less digits than its factorization.

561561266622341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7333290055.

The product of its digits is 18662400, while the sum is 56.

The spelling of 561561266622341 in words is "five hundred sixty-one trillion, five hundred sixty-one billion, two hundred sixty-six million, six hundred twenty-two thousand, three hundred forty-one".