3644199409 has 2 divisors, whose sum is σ = 3644199410. Its totient is φ = 3644199408.

The previous prime is 3644199401. The next prime is 3644199443. The reversal of 3644199409 is 9049914463.

3644199409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2898745600 + 745453809 = 53840^2 + 27303^2 .

It is a cyclic number.

It is not a de Polignac number, because 3644199409 - 2³ = 3644199401 is a prime.

It is not a weakly prime, because it can be changed into another prime (3644199401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822099704 + 1822099705.

It is an arithmetic number, because the mean of its divisors is an integer number (1822099705).

Almost surely, 2^3644199409 is an apocalyptic number.

It is an amenable number.

3644199409 is a deficient number, since it is larger than the sum of its proper divisors (1).

3644199409 is an equidigital number, since it uses as much as digits as its factorization.

3644199409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 3644199409 is about 60367.2047472798. The cubic root of 3644199409 is about 1538.8656695733.

The spelling of 3644199409 in words is "three billion, six hundred forty-four million, one hundred ninety-nine thousand, four hundred nine".