2128205479 has 16 divisors (see below), whose sum is σ = 2287646208. Its totient is φ = 1974674592.

The previous prime is 2128205477. The next prime is 2128205483. The reversal of 2128205479 is 9745028212.

It is a cyclic number.

It is not a de Polignac number, because 2128205479 - 2¹ = 2128205477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128205473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291694 + ... + 298900.

It is an arithmetic number, because the mean of its divisors is an integer number (142977888).

Almost surely, 2^2128205479 is an apocalyptic number.

2128205479 is a deficient number, since it is larger than the sum of its proper divisors (159440729).

2128205479 is a wasteful number, since it uses less digits than its factorization.

2128205479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7614.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 2128205479 is about 46132.4774860401. The cubic root of 2128205479 is about 1286.2869167622.

The spelling of 2128205479 in words is "two billion, one hundred twenty-eight million, two hundred five thousand, four hundred seventy-nine".