9639000000 has 980 divisors, whose sum is σ = 43219134288. Its totient is φ = 2073600000.

The previous prime is 9638999917. The next prime is 9639000031. The reversal of 9639000000 is 9369.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 139 ways as a sum of consecutive naturals, for example, 566999992 + ... + 567000008.

Almost surely, 2^9639000000 is an apocalyptic number.

9639000000 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9639000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21609567144).

9639000000 is an abundant number, since it is smaller than the sum of its proper divisors (33580134288).

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

9639000000 is an frugal number, since it uses more digits than its factorization.

9639000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 9639000000 is about 98178.4090317214. The cubic root of 9639000000 is about 2128.1912834252.

Adding to 9639000000 its reverse (9369), we get a palindrome (9639009369).

The spelling of 9639000000 in words is "nine billion, six hundred thirty-nine million", and thus it is an aban number.