9009391616 has 48 divisors (see below), whose sum is σ = 18595624320. Its totient is φ = 4359352320.

The previous prime is 9009391543. The next prime is 9009391631. The reversal of 9009391616 is 6161939009.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7466 + ... + 134441.

It is an arithmetic number, because the mean of its divisors is an integer number (387408840).

Almost surely, 2^9009391616 is an apocalyptic number.

It is an amenable number.

9009391616 is an abundant number, since it is smaller than the sum of its proper divisors (9586232704).

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

9009391616 is a wasteful number, since it uses less digits than its factorization.

9009391616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141960 (or 141940 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 9009391616 is about 94917.8150612413. The cubic root of 9009391616 is about 2080.8071029527.

The spelling of 9009391616 in words is "nine billion, nine million, three hundred ninety-one thousand, six hundred sixteen".