3643543449 has 48 divisors (see below), whose sum is σ = 6495320832. Its totient is φ = 1916555904.

The previous prime is 3643543373. The next prime is 3643543451. The reversal of 3643543449 is 9443453463.

3643543449 is a `hidden beast` number, since 3 + 64 + 3 + 543 + 4 + 49 = 666.

3643543449 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3643543449 - 2⁹ = 3643542937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3643543489) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 299524 + ... + 311450.

It is an arithmetic number, because the mean of its divisors is an integer number (135319184).

Almost surely, 2^3643543449 is an apocalyptic number.

3643543449 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3643543449 is a deficient number, since it is larger than the sum of its proper divisors (2851777383).

3643543449 is a wasteful number, since it uses less digits than its factorization.

3643543449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12326 (or 12323 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 45.

The square root of 3643543449 is about 60361.7714203286. The cubic root of 3643543449 is about 1538.7733315146.

The spelling of 3643543449 in words is "three billion, six hundred forty-three million, five hundred forty-three thousand, four hundred forty-nine".