2129189265 has 48 divisors (see below), whose sum is σ = 4221130368. Its totient is φ = 972580608.

The previous prime is 2129189263. The next prime is 2129189273. The reversal of 2129189265 is 5629819212.

It is a happy number.

2129189265 is a `hidden beast` number, since 21 + 291 + 89 + 265 = 666.

It is not a de Polignac number, because 2129189265 - 2¹ = 2129189263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2129189265.

It is not an unprimeable number, because it can be changed into a prime (2129189263) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 671574 + ... + 674736.

It is an arithmetic number, because the mean of its divisors is an integer number (87940216).

Almost surely, 2^2129189265 is an apocalyptic number.

It is an amenable number.

2129189265 is a deficient number, since it is larger than the sum of its proper divisors (2091941103).

2129189265 is a wasteful number, since it uses less digits than its factorization.

2129189265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5318 (or 5315 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 2129189265 is about 46143.1388724261. The cubic root of 2129189265 is about 1286.4850862430.

The spelling of 2129189265 in words is "two billion, one hundred twenty-nine million, one hundred eighty-nine thousand, two hundred sixty-five".