2189565653 has 4 divisors (see below), whose sum is σ = 2388617088. Its totient is φ = 1990514220.

The previous prime is 2189565649. The next prime is 2189565689. The reversal of 2189565653 is 3565659812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2189565653 - 2² = 2189565649 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189565953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99525701 + ... + 99525722.

It is an arithmetic number, because the mean of its divisors is an integer number (597154272).

Almost surely, 2^2189565653 is an apocalyptic number.

It is an amenable number.

2189565653 is a deficient number, since it is larger than the sum of its proper divisors (199051435).

2189565653 is a wasteful number, since it uses less digits than its factorization.

2189565653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199051434.

The product of its digits is 1944000, while the sum is 50.

The square root of 2189565653 is about 46792.7948834006. The cubic root of 2189565653 is about 1298.5320022872.

The spelling of 2189565653 in words is "two billion, one hundred eighty-nine million, five hundred sixty-five thousand, six hundred fifty-three".