3643983901 has 18 divisors (see below), whose sum is σ = 3796539806. Its totient is φ = 3496599600.

The previous prime is 3643983899. The next prime is 3643983911. The reversal of 3643983901 is 1093893463.

It can be written as a sum of positive squares in only one way, i.e., 2150547876 + 1493436025 = 46374^2 + 38645^2 .

It is not a de Polignac number, because 3643983901 - 2¹ = 3643983899 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 (3643983911) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 27816606 + ... + 27816736.

Almost surely, 2^3643983901 is an apocalyptic number.

It is an amenable number.

3643983901 is a deficient number, since it is larger than the sum of its proper divisors (152555905).

3643983901 is an frugal number, since it uses more digits than its factorization.

3643983901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 46.

The square root of 3643983901 is about 60365.4197450825. The cubic root of 3643983901 is about 1538.8353342044.

The spelling of 3643983901 in words is "three billion, six hundred forty-three million, nine hundred eighty-three thousand, nine hundred one".