9999747632 has 80 divisors (see below), whose sum is σ = 22611052800. Its totient is φ = 4195488000.

The previous prime is 9999747529. The next prime is 9999747643. The reversal of 9999747632 is 2367479999.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1655594 + ... + 1661622.

It is an arithmetic number, because the mean of its divisors is an integer number (282638160).

Almost surely, 2^9999747632 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 9999747632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11305526400).

9999747632 is an abundant number, since it is smaller than the sum of its proper divisors (12611305168).

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

9999747632 is a wasteful number, since it uses less digits than its factorization.

9999747632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6354 (or 6348 counting only the distinct ones).

The product of its digits is 46294416, while the sum is 65.

The square root of 9999747632 is about 99998.7381520387. The cubic root of 9999747632 is about 2154.4165662003.

The spelling of 9999747632 in words is "nine billion, nine hundred ninety-nine million, seven hundred forty-seven thousand, six hundred thirty-two".