2128995745 has 8 divisors (see below), whose sum is σ = 2567764584. Its totient is φ = 1694550144.

The previous prime is 2128995689. The next prime is 2128995787. The reversal of 2128995745 is 5475998212.

It can be written as a sum of positive squares in 4 ways, for example, as 1355933329 + 773062416 = 36823^2 + 27804^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2128995745 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2128995692 and 2128995701.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1079724 + ... + 1081693.

It is an arithmetic number, because the mean of its divisors is an integer number (320970573).

Almost surely, 2^2128995745 is an apocalyptic number.

It is an amenable number.

2128995745 is a deficient number, since it is larger than the sum of its proper divisors (438768839).

2128995745 is a wasteful number, since it uses less digits than its factorization.

2128995745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161619.

The product of its digits is 1814400, while the sum is 52.

The square root of 2128995745 is about 46141.0418716353. The cubic root of 2128995745 is about 1286.4461092576.

The spelling of 2128995745 in words is "two billion, one hundred twenty-eight million, nine hundred ninety-five thousand, seven hundred forty-five".