3644436401 has 2 divisors, whose sum is σ = 3644436402. Its totient is φ = 3644436400.

The previous prime is 3644436377. The next prime is 3644436427. The reversal of 3644436401 is 1046344463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3163950001 + 480486400 = 56249^2 + 21920^2 .

It is an emirp because it is prime and its reverse (1046344463) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3644436401 is a prime.

It is not a weakly prime, because it can be changed into another prime (3644436701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822218200 + 1822218201.

It is an arithmetic number, because the mean of its divisors is an integer number (1822218201).

Almost surely, 2^3644436401 is an apocalyptic number.

It is an amenable number.

3644436401 is a deficient number, since it is larger than the sum of its proper divisors (1).

3644436401 is an equidigital number, since it uses as much as digits as its factorization.

3644436401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 35.

The square root of 3644436401 is about 60369.1676354743. The cubic root of 3644436401 is about 1538.8990276955.

The spelling of 3644436401 in words is "three billion, six hundred forty-four million, four hundred thirty-six thousand, four hundred one".