9856327765 has 4 divisors (see below), whose sum is σ = 11827593324. Its totient is φ = 7885062208.

The previous prime is 9856327763. The next prime is 9856327807. The reversal of 9856327765 is 5677236589.

9856327765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 6198255441 + 3658072324 = 78729^2 + 60482^2 .

It is a cyclic number.

It is not a de Polignac number, because 9856327765 - 2¹ = 9856327763 is a prime.

It is a super-2 number, since 2×9856327765² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9856327763) 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 3 ways as a sum of consecutive naturals, for example, 985632772 + ... + 985632781.

It is an arithmetic number, because the mean of its divisors is an integer number (2956898331).

Almost surely, 2^9856327765 is an apocalyptic number.

It is an amenable number.

9856327765 is a deficient number, since it is larger than the sum of its proper divisors (1971265559).

9856327765 is a wasteful number, since it uses less digits than its factorization.

9856327765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971265558.

The product of its digits is 19051200, while the sum is 58.

The square root of 9856327765 is about 99279.0399077267. The cubic root of 9856327765 is about 2144.0671311131.

The spelling of 9856327765 in words is "nine billion, eight hundred fifty-six million, three hundred twenty-seven thousand, seven hundred sixty-five".