9969643938815 has 32 divisors (see below), whose sum is σ = 13236590495232. Its totient is φ = 7147663600000.

The previous prime is 9969643938797. The next prime is 9969643938841. The reversal of 9969643938815 is 5188393469699.

It is not a de Polignac number, because 9969643938815 - 2¹⁶ = 9969643873279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9969643938815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33046244 + ... + 33346566.

It is an arithmetic number, because the mean of its divisors is an integer number (413643452976).

Almost surely, 2^{9969643938815} is an apocalyptic number.

9969643938815 is a deficient number, since it is larger than the sum of its proper divisors (3266946556417).

9969643938815 is a wasteful number, since it uses less digits than its factorization.

9969643938815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308911.

The product of its digits is 2720977920, while the sum is 80.

The spelling of 9969643938815 in words is "nine trillion, nine hundred sixty-nine billion, six hundred forty-three million, nine hundred thirty-eight thousand, eight hundred fifteen".