5643645 has 32 divisors (see below), whose sum is σ = 10506240. Its totient is φ = 2533440.

The previous prime is 5643641. The next prime is 5643653. The reversal of 5643645 is 5463465.

It is not a de Polignac number, because 5643645 - 2² = 5643641 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5643641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5740 + ... + 6650.

It is an arithmetic number, because the mean of its divisors is an integer number (328320).

Almost surely, 2^5643645 is an apocalyptic number.

It is an amenable number.

5643645 is a deficient number, since it is larger than the sum of its proper divisors (4862595).

5643645 is a wasteful number, since it uses less digits than its factorization.

5643645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985.

The product of its digits is 43200, while the sum is 33.

The square root of 5643645 is about 2375.6357043958. The cubic root of 5643645 is about 178.0409471089.

The spelling of 5643645 in words is "five million, six hundred forty-three thousand, six hundred forty-five".