9720941806965 has 32 divisors (see below), whose sum is σ = 15983286497280. Its totient is φ = 5041407596544.

The previous prime is 9720941806931. The next prime is 9720941806967. The reversal of 9720941806965 is 5696081490279.

It is not a de Polignac number, because 9720941806965 - 2⁷ = 9720941806837 is a prime.

It is a super-3 number, since 3×9720941806965³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 9720941806896 and 9720941806905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9720941806967) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4218805 + ... + 6102474.

It is an arithmetic number, because the mean of its divisors is an integer number (499477703040).

Almost surely, 2^{9720941806965} is an apocalyptic number.

It is an amenable number.

9720941806965 is a deficient number, since it is larger than the sum of its proper divisors (6262344690315).

9720941806965 is a wasteful number, since it uses less digits than its factorization.

9720941806965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10323021.

The product of its (nonzero) digits is 58786560, while the sum is 66.

The spelling of 9720941806965 in words is "nine trillion, seven hundred twenty billion, nine hundred forty-one million, eight hundred six thousand, nine hundred sixty-five".