561126406125443 has 2 divisors, whose sum is σ = 561126406125444. Its totient is φ = 561126406125442.

The previous prime is 561126406125433. The next prime is 561126406125539. The reversal of 561126406125443 is 344521604621165.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561126406125443 - 2¹⁶ = 561126406059907 is a prime.

It is a super-2 number, since 2×561126406125443² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 561126406125391 and 561126406125400.

It is not a weakly prime, because it can be changed into another prime (561126406125403) 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 as a sum of consecutive naturals, namely, 280563203062721 + 280563203062722.

It is an arithmetic number, because the mean of its divisors is an integer number (280563203062722).

Almost surely, 2^{561126406125443} is an apocalyptic number.

561126406125443 is a deficient number, since it is larger than the sum of its proper divisors (1).

561126406125443 is an equidigital number, since it uses as much as digits as its factorization.

561126406125443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4147200, while the sum is 50.

The spelling of 561126406125443 in words is "five hundred sixty-one trillion, one hundred twenty-six billion, four hundred six million, one hundred twenty-five thousand, four hundred forty-three".