4049728649 has 2 divisors, whose sum is σ = 4049728650. Its totient is φ = 4049728648.

The previous prime is 4049728621. The next prime is 4049728651. The reversal of 4049728649 is 9468279404.

4049728649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4049031424 + 697225 = 63632^2 + 835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4049728649 is a prime.

Together with 4049728651, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4049728649.

It is not a weakly prime, because it can be changed into another prime (4049728619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2024864324 + 2024864325.

It is an arithmetic number, because the mean of its divisors is an integer number (2024864325).

Almost surely, 2^4049728649 is an apocalyptic number.

It is an amenable number.

4049728649 is a deficient number, since it is larger than the sum of its proper divisors (1).

4049728649 is an equidigital number, since it uses as much as digits as its factorization.

4049728649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The square root of 4049728649 is about 63637.4783362760. The cubic root of 4049728649 is about 1593.9522537856.

The spelling of 4049728649 in words is "four billion, forty-nine million, seven hundred twenty-eight thousand, six hundred forty-nine".