4165664225543 has 2 divisors, whose sum is σ = 4165664225544. Its totient is φ = 4165664225542.

The previous prime is 4165664225537. The next prime is 4165664225587. The reversal of 4165664225543 is 3455224665614.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4165664225543 - 2¹⁸ = 4165663963399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4165664245543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2082832112771 + 2082832112772.

It is an arithmetic number, because the mean of its divisors is an integer number (2082832112772).

Almost surely, 2^{4165664225543} is an apocalyptic number.

4165664225543 is a deficient number, since it is larger than the sum of its proper divisors (1).

4165664225543 is an equidigital number, since it uses as much as digits as its factorization.

4165664225543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736000, while the sum is 53.

The spelling of 4165664225543 in words is "four trillion, one hundred sixty-five billion, six hundred sixty-four million, two hundred twenty-five thousand, five hundred forty-three".