3996169256609 has 2 divisors, whose sum is σ = 3996169256610. Its totient is φ = 3996169256608.

The previous prime is 3996169256581. The next prime is 3996169256641. The reversal of 3996169256609 is 9066529616993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3176782216609 + 819387040000 = 1782353^2 + 905200^2 .

It is a cyclic number.

It is not a de Polignac number, because 3996169256609 - 2²⁴ = 3996152479393 is a prime.

It is not a weakly prime, because it can be changed into another prime (3996169256309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1998084628304 + 1998084628305.

It is an arithmetic number, because the mean of its divisors is an integer number (1998084628305).

Almost surely, 2^{3996169256609} is an apocalyptic number.

It is an amenable number.

3996169256609 is a deficient number, since it is larger than the sum of its proper divisors (1).

3996169256609 is an equidigital number, since it uses as much as digits as its factorization.

3996169256609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 255091680, while the sum is 71.

The spelling of 3996169256609 in words is "three trillion, nine hundred ninety-six billion, one hundred sixty-nine million, two hundred fifty-six thousand, six hundred nine".