9969919845 has 8 divisors (see below), whose sum is σ = 15951871776. Its totient is φ = 5317290576.

The previous prime is 9969919793. The next prime is 9969919877. The reversal of 9969919845 is 5489199699.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9969919845 - 2¹⁶ = 9969854309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9969919845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332330647 + ... + 332330676.

It is an arithmetic number, because the mean of its divisors is an integer number (1993983972).

Almost surely, 2^9969919845 is an apocalyptic number.

It is an amenable number.

9969919845 is a deficient number, since it is larger than the sum of its proper divisors (5981951931).

9969919845 is a wasteful number, since it uses less digits than its factorization.

9969919845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664661331.

The product of its digits is 56687040, while the sum is 69.

The square root of 9969919845 is about 99849.4859526077. The cubic root of 9969919845 is about 2152.2723294619.

The spelling of 9969919845 in words is "nine billion, nine hundred sixty-nine million, nine hundred nineteen thousand, eight hundred forty-five".