4181663041909 has 2 divisors, whose sum is σ = 4181663041910. Its totient is φ = 4181663041908.

The previous prime is 4181663041883. The next prime is 4181663041979. The reversal of 4181663041909 is 9091403661814.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4181526034884 + 137007025 = 2044878^2 + 11705^2 .

It is a cyclic number.

It is not a de Polignac number, because 4181663041909 - 2⁷ = 4181663041781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4181663041979) 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, 2090831520954 + 2090831520955.

It is an arithmetic number, because the mean of its divisors is an integer number (2090831520955).

Almost surely, 2^{4181663041909} is an apocalyptic number.

It is an amenable number.

4181663041909 is a deficient number, since it is larger than the sum of its proper divisors (1).

4181663041909 is an equidigital number, since it uses as much as digits as its factorization.

4181663041909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 4181663041909 in words is "four trillion, one hundred eighty-one billion, six hundred sixty-three million, forty-one thousand, nine hundred nine".