3644742209 has 2 divisors, whose sum is σ = 3644742210. Its totient is φ = 3644742208.

The previous prime is 3644742121. The next prime is 3644742259. The reversal of 3644742209 is 9022474463.

3644742209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2635282225 + 1009459984 = 51335^2 + 31772^2 .

It is a cyclic number.

It is not a de Polignac number, because 3644742209 - 2²⁰ = 3643693633 is a prime.

It is not a weakly prime, because it can be changed into another prime (3644742259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822371104 + 1822371105.

It is an arithmetic number, because the mean of its divisors is an integer number (1822371105).

Almost surely, 2^3644742209 is an apocalyptic number.

It is an amenable number.

3644742209 is a deficient number, since it is larger than the sum of its proper divisors (1).

3644742209 is an equidigital number, since it uses as much as digits as its factorization.

3644742209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 41.

The square root of 3644742209 is about 60371.7003984483. The cubic root of 3644742209 is about 1538.9420699677.

The spelling of 3644742209 in words is "three billion, six hundred forty-four million, seven hundred forty-two thousand, two hundred nine".