2144465909 has 4 divisors (see below), whose sum is σ = 2144608716. Its totient is φ = 2144323104.

The previous prime is 2144465893. The next prime is 2144465923. The reversal of 2144465909 is 9095644412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1496916100 + 647549809 = 38690^2 + 25447^2 .

It is a cyclic number.

It is not a de Polignac number, because 2144465909 - 2⁴ = 2144465893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2144465909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144465209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45824 + ... + 79929.

It is an arithmetic number, because the mean of its divisors is an integer number (536152179).

Almost surely, 2^2144465909 is an apocalyptic number.

It is an amenable number.

2144465909 is a deficient number, since it is larger than the sum of its proper divisors (142807).

2144465909 is a wasteful number, since it uses less digits than its factorization.

2144465909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142806.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 2144465909 is about 46308.3783887970. The cubic root of 2144465909 is about 1289.5545422259.

The spelling of 2144465909 in words is "two billion, one hundred forty-four million, four hundred sixty-five thousand, nine hundred nine".