2128849845 has 16 divisors (see below), whose sum is σ = 3407642880. Its totient is φ = 1134892224.

The previous prime is 2128849841. The next prime is 2128849883. The reversal of 2128849845 is 5489488212.

It is not a de Polignac number, because 2128849845 - 2² = 2128849841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128849841) 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, 6132 + ... + 65538.

It is an arithmetic number, because the mean of its divisors is an integer number (212977680).

Almost surely, 2^2128849845 is an apocalyptic number.

It is an amenable number.

2128849845 is a deficient number, since it is larger than the sum of its proper divisors (1278793035).

2128849845 is a wasteful number, since it uses less digits than its factorization.

2128849845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61804.

The product of its digits is 1474560, while the sum is 51.

The square root of 2128849845 is about 46139.4608225974. The cubic root of 2128849845 is about 1286.4167218848.

The spelling of 2128849845 in words is "two billion, one hundred twenty-eight million, eight hundred forty-nine thousand, eight hundred forty-five".