11664311993 has 2 divisors, whose sum is σ = 11664311994. Its totient is φ = 11664311992.

The previous prime is 11664311959. The next prime is 11664312007. The reversal of 11664311993 is 39911346611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11446218169 + 218093824 = 106987^2 + 14768^2 .

It is a cyclic number.

It is not a de Polignac number, because 11664311993 - 2⁶ = 11664311929 is a prime.

It is not a weakly prime, because it can be changed into another prime (11664313993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5832155996 + 5832155997.

It is an arithmetic number, because the mean of its divisors is an integer number (5832155997).

Almost surely, 2^11664311993 is an apocalyptic number.

It is an amenable number.

11664311993 is a deficient number, since it is larger than the sum of its proper divisors (1).

11664311993 is an equidigital number, since it uses as much as digits as its factorization.

11664311993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 44.

The spelling of 11664311993 in words is "eleven billion, six hundred sixty-four million, three hundred eleven thousand, nine hundred ninety-three".