2143565604 has 36 divisors (see below), whose sum is σ = 5420307984. Its totient is φ = 714277872.

The previous prime is 2143565603. The next prime is 2143565621. The reversal of 2143565604 is 4065653412.

2143565604 is a `hidden beast` number, since 2 + 1 + 43 + 5 + 6 + 5 + 604 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2143565603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119299 + ... + 136085.

It is a vampire number, since it can be written as 42564 ⋅ 50361 (with its own digits).

Almost surely, 2^2143565604 is an apocalyptic number.

It is an amenable number.

2143565604 is an abundant number, since it is smaller than the sum of its proper divisors (3276742380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2143565604 is a wasteful number, since it uses less digits than its factorization.

2143565604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20344 (or 20339 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 2143565604 is about 46298.6566111804. The cubic root of 2143565604 is about 1289.3740536316.

The spelling of 2143565604 in words is "two billion, one hundred forty-three million, five hundred sixty-five thousand, six hundred four".