9946814591993 has 2 divisors, whose sum is σ = 9946814591994. Its totient is φ = 9946814591992.

The previous prime is 9946814591969. The next prime is 9946814592097. The reversal of 9946814591993 is 3991954186499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9906831790144 + 39982801849 = 3147512^2 + 199957^2 .

It is a cyclic number.

It is not a de Polignac number, because 9946814591993 - 2⁸ = 9946814591737 is a prime.

It is not a weakly prime, because it can be changed into another prime (9946814599993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4973407295996 + 4973407295997.

It is an arithmetic number, because the mean of its divisors is an integer number (4973407295997).

Almost surely, 2^{9946814591993} is an apocalyptic number.

It is an amenable number.

9946814591993 is a deficient number, since it is larger than the sum of its proper divisors (1).

9946814591993 is an equidigital number, since it uses as much as digits as its factorization.

9946814591993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680244480, while the sum is 77.

The spelling of 9946814591993 in words is "nine trillion, nine hundred forty-six billion, eight hundred fourteen million, five hundred ninety-one thousand, nine hundred ninety-three".