9776217285 has 24 divisors (see below), whose sum is σ = 17942235480. Its totient is φ = 4907277312.

The previous prime is 9776217239. The next prime is 9776217299. The reversal of 9776217285 is 5827126779.

It is a happy number.

9776217285 is a `hidden beast` number, since 9 + 7 + 7 + 621 + 7 + 2 + 8 + 5 = 666.

9776217285 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 4 ways, for example, as 687645729 + 9088571556 = 26223^2 + 95334^2 .

It is not a de Polignac number, because 9776217285 - 2⁶ = 9776217221 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 23 ways as a sum of consecutive naturals, for example, 6388920 + ... + 6390449.

It is an arithmetic number, because the mean of its divisors is an integer number (747593145).

Almost surely, 2^9776217285 is an apocalyptic number.

It is an amenable number.

9776217285 is a deficient number, since it is larger than the sum of its proper divisors (8166018195).

9776217285 is a wasteful number, since it uses less digits than its factorization.

9776217285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12779397 (or 12779394 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The square root of 9776217285 is about 98874.7555496346. The cubic root of 9776217285 is about 2138.2424563505.

It can be divided in two parts, 977621 and 7285, that added together give a triangular number (984906 = T₁₄₀₃).

The spelling of 9776217285 in words is "nine billion, seven hundred seventy-six million, two hundred seventeen thousand, two hundred eighty-five".