3544720668791 has 2 divisors, whose sum is σ = 3544720668792. Its totient is φ = 3544720668790.

The previous prime is 3544720668779. The next prime is 3544720668799. The reversal of 3544720668791 is 1978660274453.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3544720668791 is a prime.

It is a super-2 number, since 2×3544720668791² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3544720668799) 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, 1772360334395 + 1772360334396.

It is an arithmetic number, because the mean of its divisors is an integer number (1772360334396).

It is a 1-persistent number, because it is pandigital, but 2⋅3544720668791 = 7089441337582 is not.

Almost surely, 2^{3544720668791} is an apocalyptic number.

3544720668791 is a deficient number, since it is larger than the sum of its proper divisors (1).

3544720668791 is an equidigital number, since it uses as much as digits as its factorization.

3544720668791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60963840, while the sum is 62.

The spelling of 3544720668791 in words is "three trillion, five hundred forty-four billion, seven hundred twenty million, six hundred sixty-eight thousand, seven hundred ninety-one".