5664041720881 has 2 divisors, whose sum is σ = 5664041720882. Its totient is φ = 5664041720880.

The previous prime is 5664041720861. The next prime is 5664041720929. The reversal of 5664041720881 is 1880271404665.

5664041720881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4838504115600 + 825537605281 = 2199660^2 + 908591^2 .

It is a cyclic number.

It is not a de Polignac number, because 5664041720881 - 2¹¹ = 5664041718833 is a prime.

It is a super-2 number, since 2×5664041720881² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5664041720851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2832020860440 + 2832020860441.

It is an arithmetic number, because the mean of its divisors is an integer number (2832020860441).

Almost surely, 2^{5664041720881} is an apocalyptic number.

It is an amenable number.

5664041720881 is a deficient number, since it is larger than the sum of its proper divisors (1).

5664041720881 is an equidigital number, since it uses as much as digits as its factorization.

5664041720881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 5664041720881 in words is "five trillion, six hundred sixty-four billion, forty-one million, seven hundred twenty thousand, eight hundred eighty-one".