4447908649 has 4 divisors (see below), whose sum is σ = 4448252164. Its totient is φ = 4447565136.

The previous prime is 4447908617. The next prime is 4447908743. The reversal of 4447908649 is 9468097444.

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 2553483024 + 1894425625 = 50532^2 + 43525^2 .

It is a cyclic number.

It is not a de Polignac number, because 4447908649 - 2⁵ = 4447908617 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 4447908649.

It is not an unprimeable number, because it can be changed into a prime (4447908149) 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, 151542 + ... + 178495.

It is an arithmetic number, because the mean of its divisors is an integer number (1112063041).

Almost surely, 2^4447908649 is an apocalyptic number.

It is an amenable number.

4447908649 is a deficient number, since it is larger than the sum of its proper divisors (343515).

4447908649 is a wasteful number, since it uses less digits than its factorization.

4447908649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343514.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The square root of 4447908649 is about 66692.6431400046. The cubic root of 4447908649 is about 1644.5684451040.

The spelling of 4447908649 in words is "four billion, four hundred forty-seven million, nine hundred eight thousand, six hundred forty-nine".