9120656161 has 4 divisors (see below), whose sum is σ = 9152884912. Its totient is φ = 9088427412.

The previous prime is 9120656147. The next prime is 9120656173. The reversal of 9120656161 is 1616560219.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9120656161 - 2⁷ = 9120656033 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 9120656161.

It is not an unprimeable number, because it can be changed into a prime (9120656191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16113951 + ... + 16114516.

It is an arithmetic number, because the mean of its divisors is an integer number (2288221228).

Almost surely, 2^9120656161 is an apocalyptic number.

It is an amenable number.

9120656161 is a deficient number, since it is larger than the sum of its proper divisors (32228751).

9120656161 is a wasteful number, since it uses less digits than its factorization.

9120656161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32228750.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 9120656161 is about 95502.1264737074. The cubic root of 9120656161 is about 2089.3379587737.

It can be divided in two parts, 9120 and 656161, that added together give a triangular number (665281 = T₁₁₅₃).

The spelling of 9120656161 in words is "nine billion, one hundred twenty million, six hundred fifty-six thousand, one hundred sixty-one".