2148890665 has 16 divisors (see below), whose sum is σ = 2634782400. Its totient is φ = 1682049600.

The previous prime is 2148890659. The next prime is 2148890669. The reversal of 2148890665 is 5660988412.

It is not a de Polignac number, because 2148890665 - 2³ = 2148890657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2148890669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28390 + ... + 71440.

It is an arithmetic number, because the mean of its divisors is an integer number (164673900).

Almost surely, 2^2148890665 is an apocalyptic number.

It is an amenable number.

2148890665 is a deficient number, since it is larger than the sum of its proper divisors (485891735).

2148890665 is a wasteful number, since it uses less digits than its factorization.

2148890665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43272.

The product of its (nonzero) digits is 829440, while the sum is 49.

The square root of 2148890665 is about 46356.1286670921. The cubic root of 2148890665 is about 1290.4408614758.

The spelling of 2148890665 in words is "two billion, one hundred forty-eight million, eight hundred ninety thousand, six hundred sixty-five".