3641644643 has 16 divisors (see below), whose sum is σ = 4483987200. Its totient is φ = 2880039456.

The previous prime is 3641644627. The next prime is 3641644649. The reversal of 3641644643 is 3464461463.

3641644643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3641644643 - 2⁴ = 3641644627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3641644643.

It is not an unprimeable number, because it can be changed into a prime (3641644649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238196 + ... + 253022.

It is an arithmetic number, because the mean of its divisors is an integer number (280249200).

Almost surely, 2^3641644643 is an apocalyptic number.

3641644643 is a deficient number, since it is larger than the sum of its proper divisors (842342557).

3641644643 is a wasteful number, since it uses less digits than its factorization.

3641644643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17546.

The product of its digits is 497664, while the sum is 41.

The square root of 3641644643 is about 60346.0408229073. The cubic root of 3641644643 is about 1538.5059782465.

The spelling of 3641644643 in words is "three billion, six hundred forty-one million, six hundred forty-four thousand, six hundred forty-three".