9865707144 has 64 divisors (see below), whose sum is σ = 25095536640. Its totient is φ = 3231183360.

The previous prime is 9865707139. The next prime is 9865707149. The reversal of 9865707144 is 4417075689.

It is an interprime number because it is at equal distance from previous prime (9865707139) and next prime (9865707149).

It is not an unprimeable number, because it can be changed into a prime (9865707149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1602937 + ... + 1609079.

It is an arithmetic number, because the mean of its divisors is an integer number (392117760).

Almost surely, 2^9865707144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9865707144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12547768320).

9865707144 is an abundant number, since it is smaller than the sum of its proper divisors (15229829496).

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

9865707144 is a wasteful number, since it uses less digits than its factorization.

9865707144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7310 (or 7306 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 51.

The square root of 9865707144 is about 99326.2661333849. The cubic root of 9865707144 is about 2144.7470206592.

The spelling of 9865707144 in words is "nine billion, eight hundred sixty-five million, seven hundred seven thousand, one hundred forty-four".