9769996616891 has 6 divisors (see below), whose sum is σ = 11365098105420. Its totient is φ = 8374282814436.

The previous prime is 9769996616881. The next prime is 9769996616971. The reversal of 9769996616891 is 1986166999679.

It is a de Polignac number, because none of the positive numbers 2^k-9769996616891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9769996616881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99693842981 + ... + 99693843078.

It is an arithmetic number, because the mean of its divisors is an integer number (1894183017570).

Almost surely, 2^{9769996616891} is an apocalyptic number.

9769996616891 is a deficient number, since it is larger than the sum of its proper divisors (1595101488529).

9769996616891 is a wasteful number, since it uses less digits than its factorization.

9769996616891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199387686073 (or 199387686066 counting only the distinct ones).

The product of its digits is 4285540224, while the sum is 86.

The spelling of 9769996616891 in words is "nine trillion, seven hundred sixty-nine billion, nine hundred ninety-six million, six hundred sixteen thousand, eight hundred ninety-one".