9936856459 has 4 divisors (see below), whose sum is σ = 9958318816. Its totient is φ = 9915394104.

The previous prime is 9936856453. The next prime is 9936856469. The reversal of 9936856459 is 9546586399.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9936856459 - 2¹³ = 9936848267 is a prime.

It is a super-2 number, since 2×9936856459² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9936856459.

It is not an unprimeable number, because it can be changed into a prime (9936856453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10730484 + ... + 10731409.

It is an arithmetic number, because the mean of its divisors is an integer number (2489579704).

Almost surely, 2^9936856459 is an apocalyptic number.

9936856459 is a deficient number, since it is larger than the sum of its proper divisors (21462357).

9936856459 is a wasteful number, since it uses less digits than its factorization.

9936856459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21462356.

The product of its digits is 62985600, while the sum is 64.

The square root of 9936856459 is about 99683.7823269161. The cubic root of 9936856459 is about 2149.8904908348.

The spelling of 9936856459 in words is "nine billion, nine hundred thirty-six million, eight hundred fifty-six thousand, four hundred fifty-nine".