2144335649 has 4 divisors (see below), whose sum is σ = 2257195440. Its totient is φ = 2031475860.

The previous prime is 2144335637. The next prime is 2144335657. The reversal of 2144335649 is 9465334412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2144335649 - 2⁸ = 2144335393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2144335049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56429867 + ... + 56429904.

It is an arithmetic number, because the mean of its divisors is an integer number (564298860).

Almost surely, 2^2144335649 is an apocalyptic number.

It is an amenable number.

2144335649 is a deficient number, since it is larger than the sum of its proper divisors (112859791).

2144335649 is a wasteful number, since it uses less digits than its factorization.

2144335649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112859790.

The product of its digits is 311040, while the sum is 41.

The square root of 2144335649 is about 46306.9719264821. The cubic root of 2144335649 is about 1289.5284314858.

The spelling of 2144335649 in words is "two billion, one hundred forty-four million, three hundred thirty-five thousand, six hundred forty-nine".