2189644570 has 16 divisors (see below), whose sum is σ = 3941901288. Its totient is φ = 875737600.

The previous prime is 2189644553. The next prime is 2189644579. The reversal of 2189644570 is 754469812.

It can be written as a sum of positive squares in 4 ways, for example, as 1188111961 + 1001532609 = 34469^2 + 31647^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2189644570.

It is not an unprimeable number, because it can be changed into a prime (2189644579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115182 + ... + 132838.

Almost surely, 2^2189644570 is an apocalyptic number.

2189644570 is a deficient number, since it is larger than the sum of its proper divisors (1752256718).

2189644570 is a wasteful number, since it uses less digits than its factorization.

2189644570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30065.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 2189644570 is about 46793.6381359689. The cubic root of 2189644570 is about 1298.5476027966.

It can be divided in two parts, 21896 and 44570, that added together give a palindrome (66466).

The spelling of 2189644570 in words is "two billion, one hundred eighty-nine million, six hundred forty-four thousand, five hundred seventy".