2128275609 has 4 divisors (see below), whose sum is σ = 2837700816. Its totient is φ = 1418850404.

The previous prime is 2128275593. The next prime is 2128275619. The reversal of 2128275609 is 9065728212.

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 2128275609 - 2⁴ = 2128275593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2128275619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354712599 + ... + 354712604.

It is an arithmetic number, because the mean of its divisors is an integer number (709425204).

Almost surely, 2^2128275609 is an apocalyptic number.

It is an amenable number.

2128275609 is a deficient number, since it is larger than the sum of its proper divisors (709425207).

2128275609 is an equidigital number, since it uses as much as digits as its factorization.

2128275609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709425206.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 2128275609 is about 46133.2375733592. The cubic root of 2128275609 is about 1286.3010454591.

The spelling of 2128275609 in words is "two billion, one hundred twenty-eight million, two hundred seventy-five thousand, six hundred nine".