9947216816 has 10 divisors (see below), whose sum is σ = 19272732612. Its totient is φ = 4973608400.

The previous prime is 9947216761. The next prime is 9947216831. The reversal of 9947216816 is 6186127499.

9947216816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310850510 + ... + 310850541.

Almost surely, 2^9947216816 is an apocalyptic number.

It is an amenable number.

9947216816 is a deficient number, since it is larger than the sum of its proper divisors (9325515796).

9947216816 is a wasteful number, since it uses less digits than its factorization.

9947216816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621701059 (or 621701053 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 53.

The square root of 9947216816 is about 99735.7348997840. The cubic root of 9947216816 is about 2150.6374036570.

The spelling of 9947216816 in words is "nine billion, nine hundred forty-seven million, two hundred sixteen thousand, eight hundred sixteen".