9657123804791 has 8 divisors (see below), whose sum is σ = 9746104734960. Its totient is φ = 9568149846912.

The previous prime is 9657123804763. The next prime is 9657123804829. The reversal of 9657123804791 is 1974083217569.

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

It is a cyclic number.

It is not a de Polignac number, because 9657123804791 - 2²⁶ = 9657056695927 is a prime.

It is a super-2 number, since 2×9657123804791² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9657123804191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1060511 + ... + 4520943.

It is an arithmetic number, because the mean of its divisors is an integer number (1218263091870).

It is a 2-persistent number, because it is pandigital, and so is 2⋅9657123804791 = 19314247609582, but 3⋅9657123804791 = 28971371414373 is not.

Almost surely, 2^{9657123804791} is an apocalyptic number.

9657123804791 is a deficient number, since it is larger than the sum of its proper divisors (88980930169).

9657123804791 is a wasteful number, since it uses less digits than its factorization.

9657123804791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486145.

The product of its (nonzero) digits is 22861440, while the sum is 62.

The spelling of 9657123804791 in words is "nine trillion, six hundred fifty-seven billion, one hundred twenty-three million, eight hundred four thousand, seven hundred ninety-one".