2128373779 has 8 divisors (see below), whose sum is σ = 2433657600. Its totient is φ = 1823397576.

The previous prime is 2128373777. The next prime is 2128373801. The reversal of 2128373779 is 9773738212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2128373779 - 2¹ = 2128373777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2128373773) 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 7 ways as a sum of consecutive naturals, for example, 61879 + ... + 89920.

It is an arithmetic number, because the mean of its divisors is an integer number (304207200).

Almost surely, 2^2128373779 is an apocalyptic number.

2128373779 is a deficient number, since it is larger than the sum of its proper divisors (305283821).

2128373779 is a wasteful number, since it uses less digits than its factorization.

2128373779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153809.

The product of its digits is 889056, while the sum is 49.

The square root of 2128373779 is about 46134.3015445124. The cubic root of 2128373779 is about 1286.3208226960.

The spelling of 2128373779 in words is "two billion, one hundred twenty-eight million, three hundred seventy-three thousand, seven hundred seventy-nine".