2068843561 has 2 divisors, whose sum is σ = 2068843562. Its totient is φ = 2068843560.

The previous prime is 2068843523. The next prime is 2068843607. The reversal of 2068843561 is 1653488602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1380568336 + 688275225 = 37156^2 + 26235^2 .

It is a cyclic number.

It is not a de Polignac number, because 2068843561 - 2¹⁹ = 2068319273 is a prime.

It is a super-2 number, since 2×2068843561² = 8560227359782321442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2068843661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1034421780 + 1034421781.

It is an arithmetic number, because the mean of its divisors is an integer number (1034421781).

Almost surely, 2^2068843561 is an apocalyptic number.

It is an amenable number.

2068843561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2068843561 is an equidigital number, since it uses as much as digits as its factorization.

2068843561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 2068843561 is about 45484.5420005522. The cubic root of 2068843561 is about 1274.2145229390.

The spelling of 2068843561 in words is "two billion, sixty-eight million, eight hundred forty-three thousand, five hundred sixty-one".