2144605649 has 8 divisors (see below), whose sum is σ = 2153185320. Its totient is φ = 2136041856.

The previous prime is 2144605597. The next prime is 2144605667. The reversal of 2144605649 is 9465064412.

It can be written as a sum of positive squares in 4 ways, for example, as 1002165649 + 1142440000 = 31657^2 + 33800^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2144605649 is a prime.

It is a super-2 number, since 2×2144605649² = 9198666779445422402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2144605679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316307 + ... + 323015.

It is an arithmetic number, because the mean of its divisors is an integer number (269148165).

Almost surely, 2^2144605649 is an apocalyptic number.

It is an amenable number.

2144605649 is a deficient number, since it is larger than the sum of its proper divisors (8579671).

2144605649 is an equidigital number, since it uses as much as digits as its factorization.

2144605649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7939.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 2144605649 is about 46309.8871624624. The cubic root of 2144605649 is about 1289.5825520653.

The spelling of 2144605649 in words is "two billion, one hundred forty-four million, six hundred five thousand, six hundred forty-nine".