9969643938816 has 132 divisors (see below), whose sum is σ = 29853321282512. Its totient is φ = 3323214563328.

The previous prime is 9969643938797. The next prime is 9969643938841. The reversal of 9969643938816 is 6188393469699.

9969643938816 is a `hidden beast` number, since 9 + 9 + 6 + 96 + 439 + 3 + 88 + 16 = 666.

It is a super-3 number, since 3×9969643938816³ (a number of 40 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19784050 + ... + 20281713.

Almost surely, 2^{9969643938816} is an apocalyptic number.

9969643938816 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

9969643938816 is an abundant number, since it is smaller than the sum of its proper divisors (19883677343696).

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

9969643938816 is an equidigital number, since it uses as much as digits as its factorization.

9969643938816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40065798 (or 40065768 counting only the distinct ones).

The product of its digits is 3265173504, while the sum is 81.

The spelling of 9969643938816 in words is "nine trillion, nine hundred sixty-nine billion, six hundred forty-three million, nine hundred thirty-eight thousand, eight hundred sixteen".