9947527680 has 160 divisors (see below), whose sum is σ = 31989095424. Its totient is φ = 2636988416.

The previous prime is 9947527657. The next prime is 9947527697. The reversal of 9947527680 is 867257499.

It is a tau number, because it is divible by the number of its divisors (160).

It is a self number, because there is not a number n which added to its sum of digits gives 9947527680.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1324897 + ... + 1332383.

Almost surely, 2^9947527680 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 9947527680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15994547712).

9947527680 is an abundant number, since it is smaller than the sum of its proper divisors (22041567744).

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

9947527680 is a wasteful number, since it uses less digits than its factorization.

9947527680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7686 (or 7670 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 57.

The square root of 9947527680 is about 99737.2933260172. The cubic root of 9947527680 is about 2150.6598068676.

The spelling of 9947527680 in words is "nine billion, nine hundred forty-seven million, five hundred twenty-seven thousand, six hundred eighty".