2128097865 has 32 divisors (see below), whose sum is σ = 3526254720. Its totient is φ = 1094639616.

The previous prime is 2128097861. The next prime is 2128097879. The reversal of 2128097865 is 5687908212.

2128097865 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2128097865 - 2² = 2128097861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2128097861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 499434 + ... + 503676.

It is an arithmetic number, because the mean of its divisors is an integer number (110195460).

Almost surely, 2^2128097865 is an apocalyptic number.

It is an amenable number.

2128097865 is a deficient number, since it is larger than the sum of its proper divisors (1398156855).

2128097865 is a wasteful number, since it uses less digits than its factorization.

2128097865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5433.

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 2128097865 is about 46131.3111129523. The cubic root of 2128097865 is about 1286.2652357709.

The spelling of 2128097865 in words is "two billion, one hundred twenty-eight million, ninety-seven thousand, eight hundred sixty-five".