9777906649 has 16 divisors (see below), whose sum is σ = 11437659648. Its totient is φ = 8184667392.

The previous prime is 9777906647. The next prime is 9777906653. The reversal of 9777906649 is 9466097779.

It is a happy number.

9777906649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9777906649 - 2¹ = 9777906647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9777906647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117837 + ... + 182869.

It is an arithmetic number, because the mean of its divisors is an integer number (714853728).

Almost surely, 2^9777906649 is an apocalyptic number.

It is an amenable number.

9777906649 is a deficient number, since it is larger than the sum of its proper divisors (1659752999).

9777906649 is a wasteful number, since it uses less digits than its factorization.

9777906649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65544.

The product of its (nonzero) digits is 36006768, while the sum is 64.

The square root of 9777906649 is about 98883.2981296639. The cubic root of 9777906649 is about 2138.3656144757.

The spelling of 9777906649 in words is "nine billion, seven hundred seventy-seven million, nine hundred six thousand, six hundred forty-nine".