9969643938841 has 2 divisors, whose sum is σ = 9969643938842. Its totient is φ = 9969643938840.

The previous prime is 9969643938797. The next prime is 9969643938869. The reversal of 9969643938841 is 1488393469699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6346388793616 + 3623255145225 = 2519204^2 + 1903485^2 .

It is a cyclic number.

It is not a de Polignac number, because 9969643938841 - 2⁷ = 9969643938713 is a prime.

It is not a weakly prime, because it can be changed into another prime (9969643935841) 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 as a sum of consecutive naturals, namely, 4984821969420 + 4984821969421.

It is an arithmetic number, because the mean of its divisors is an integer number (4984821969421).

Almost surely, 2^{9969643938841} is an apocalyptic number.

It is an amenable number.

9969643938841 is a deficient number, since it is larger than the sum of its proper divisors (1).

9969643938841 is an equidigital number, since it uses as much as digits as its factorization.

9969643938841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2176782336, while the sum is 79.

The spelling of 9969643938841 in words is "nine trillion, nine hundred sixty-nine billion, six hundred forty-three million, nine hundred thirty-eight thousand, eight hundred forty-one".