5643655 has 4 divisors (see below), whose sum is σ = 6772392. Its totient is φ = 4514920.

The previous prime is 5643653. The next prime is 5643667. The reversal of 5643655 is 5563465.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 5643655 - 2¹ = 5643653 is a prime.

It is a Duffinian number.

5643655 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5643655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5643653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564361 + ... + 564370.

It is an arithmetic number, because the mean of its divisors is an integer number (1693098).

Almost surely, 2^5643655 is an apocalyptic number.

5643655 is a deficient number, since it is larger than the sum of its proper divisors (1128737).

5643655 is a wasteful number, since it uses less digits than its factorization.

5643655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128736.

The product of its digits is 54000, while the sum is 34.

The square root of 5643655 is about 2375.6378090946. The cubic root of 5643655 is about 178.0410522660.

The spelling of 5643655 in words is "five million, six hundred forty-three thousand, six hundred fifty-five".