3644340143 has 4 divisors (see below), whose sum is σ = 3706108680. Its totient is φ = 3582571608.

The previous prime is 3644340131. The next prime is 3644340169. The reversal of 3644340143 is 3410434463.

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 3644340143 - 2⁶ = 3644340079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644340443) 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, 30884180 + ... + 30884297.

It is an arithmetic number, because the mean of its divisors is an integer number (926527170).

Almost surely, 2^3644340143 is an apocalyptic number.

3644340143 is a deficient number, since it is larger than the sum of its proper divisors (61768537).

3644340143 is an equidigital number, since it uses as much as digits as its factorization.

3644340143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61768536.

The product of its (nonzero) digits is 41472, while the sum is 32.

The square root of 3644340143 is about 60368.3703854924. The cubic root of 3644340143 is about 1538.8854789479.

The spelling of 3644340143 in words is "three billion, six hundred forty-four million, three hundred forty thousand, one hundred forty-three".