3644445667 has 4 divisors (see below), whose sum is σ = 3647407456. Its totient is φ = 3641483880.

The previous prime is 3644445583. The next prime is 3644445709. The reversal of 3644445667 is 7665444463.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3644445667 - 2²³ = 3636057059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3644445667.

It is not an unprimeable number, because it can be changed into a prime (3644445067) 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 in 3 ways as a sum of consecutive naturals, for example, 1479048 + ... + 1481509.

It is an arithmetic number, because the mean of its divisors is an integer number (911851864).

Almost surely, 2^3644445667 is an apocalyptic number.

3644445667 is a deficient number, since it is larger than the sum of its proper divisors (2961789).

3644445667 is a wasteful number, since it uses less digits than its factorization.

3644445667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961788.

The product of its digits is 5806080, while the sum is 49.

The square root of 3644445667 is about 60369.2443798993. The cubic root of 3644445667 is about 1538.9003319142.

The spelling of 3644445667 in words is "three billion, six hundred forty-four million, four hundred forty-five thousand, six hundred sixty-seven".