9856965138 has 16 divisors (see below), whose sum is σ = 19764613440. Its totient is φ = 3277207856.

The previous prime is 9856965137. The next prime is 9856965149. The reversal of 9856965138 is 8315696589.

It is not an unprimeable number, because it can be changed into a prime (9856965133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2109270 + ... + 2113937.

It is an arithmetic number, because the mean of its divisors is an integer number (1235288340).

Almost surely, 2^9856965138 is an apocalyptic number.

9856965138 is an abundant number, since it is smaller than the sum of its proper divisors (9907648302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9856965138 is a wasteful number, since it uses less digits than its factorization.

9856965138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4223601.

The product of its digits is 13996800, while the sum is 60.

The square root of 9856965138 is about 99282.2498637093. The cubic root of 9856965138 is about 2144.1133464676.

The spelling of 9856965138 in words is "nine billion, eight hundred fifty-six million, nine hundred sixty-five thousand, one hundred thirty-eight".