10443601661 has 2 divisors, whose sum is σ = 10443601662. Its totient is φ = 10443601660.

The previous prime is 10443601657. The next prime is 10443601667. The reversal of 10443601661 is 16610634401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5655792025 + 4787809636 = 75205^2 + 69194^2 .

It is a cyclic number.

It is not a de Polignac number, because 10443601661 - 2² = 10443601657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10443601667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5221800830 + 5221800831.

It is an arithmetic number, because the mean of its divisors is an integer number (5221800831).

Almost surely, 2^10443601661 is an apocalyptic number.

It is an amenable number.

10443601661 is a deficient number, since it is larger than the sum of its proper divisors (1).

10443601661 is an equidigital number, since it uses as much as digits as its factorization.

10443601661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 10443601661 in words is "ten billion, four hundred forty-three million, six hundred one thousand, six hundred sixty-one".