9776309805 has 12 divisors (see below), whose sum is σ = 16945603740. Its totient is φ = 5214031872.

The previous prime is 9776309747. The next prime is 9776309831. The reversal of 9776309805 is 5089036779.

9776309805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4404445956 + 5371863849 = 66366^2 + 73293^2 .

It is not a de Polignac number, because 9776309805 - 2⁹ = 9776309293 is a prime.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 108625620 + ... + 108625709.

It is an arithmetic number, because the mean of its divisors is an integer number (1412133645).

Almost surely, 2^9776309805 is an apocalyptic number.

It is an amenable number.

9776309805 is a deficient number, since it is larger than the sum of its proper divisors (7169293935).

9776309805 is a wasteful number, since it uses less digits than its factorization.

9776309805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217251340 (or 217251337 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The square root of 9776309805 is about 98875.2234131484. The cubic root of 9776309805 is about 2138.2492016168.

The spelling of 9776309805 in words is "nine billion, seven hundred seventy-six million, three hundred nine thousand, eight hundred five".