3905852509849 has 2 divisors, whose sum is σ = 3905852509850. Its totient is φ = 3905852509848.

The previous prime is 3905852509841. The next prime is 3905852509859. The reversal of 3905852509849 is 9489052585093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3083774820624 + 822077689225 = 1756068^2 + 906685^2 .

It is a cyclic number.

It is not a de Polignac number, because 3905852509849 - 2³ = 3905852509841 is a prime.

It is not a weakly prime, because it can be changed into another prime (3905852509841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1952926254924 + 1952926254925.

It is an arithmetic number, because the mean of its divisors is an integer number (1952926254925).

Almost surely, 2^{3905852509849} is an apocalyptic number.

It is an amenable number.

3905852509849 is a deficient number, since it is larger than the sum of its proper divisors (1).

3905852509849 is an equidigital number, since it uses as much as digits as its factorization.

3905852509849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968000, while the sum is 67.

The spelling of 3905852509849 in words is "three trillion, nine hundred five billion, eight hundred fifty-two million, five hundred nine thousand, eight hundred forty-nine".