9359555116921 has 3 divisors (see below), whose sum is σ = 9359558176261. Its totient is φ = 9359552057582.

The previous prime is 9359555116913. The next prime is 9359555116937. The reversal of 9359555116921 is 1296115559539.

The square root of 9359555116921 is 3059339.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 9359555116921 - 2³ = 9359555116913 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 9359555116921.

It is not an unprimeable number, because it can be changed into a prime (9359555116981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1529670 + ... + 4589008.

Almost surely, 2^{9359555116921} is an apocalyptic number.

9359555116921 is the 3059339-th square number.

9359555116921 is the 1529670-th centered octagonal number.

It is an amenable number.

9359555116921 is a deficient number, since it is larger than the sum of its proper divisors (3059340).

9359555116921 is an frugal number, since it uses more digits than its factorization.

9359555116921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6118678 (or 3059339 counting only the distinct ones).

The product of its digits is 16402500, while the sum is 61.

The spelling of 9359555116921 in words is "nine trillion, three hundred fifty-nine billion, five hundred fifty-five million, one hundred sixteen thousand, nine hundred twenty-one".