9639613312 has 64 divisors (see below), whose sum is σ = 21975206400. Its totient is φ = 4126017024.

The previous prime is 9639613307. The next prime is 9639613351. The reversal of 9639613312 is 2133169369.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 745333 + ... + 758155.

It is an arithmetic number, because the mean of its divisors is an integer number (343362600).

Almost surely, 2^9639613312 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 9639613312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10987603200).

9639613312 is an abundant number, since it is smaller than the sum of its proper divisors (12335593088).

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

9639613312 is a wasteful number, since it uses less digits than its factorization.

9639613312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13683 (or 13671 counting only the distinct ones).

The product of its digits is 157464, while the sum is 43.

The square root of 9639613312 is about 98181.5324386414. The cubic root of 9639613312 is about 2128.2364201119.

The spelling of 9639613312 in words is "nine billion, six hundred thirty-nine million, six hundred thirteen thousand, three hundred twelve".