9549919961 has 4 divisors (see below), whose sum is σ = 9550410192. Its totient is φ = 9549429732.

The previous prime is 9549919913. The next prime is 9549919979. The reversal of 9549919961 is 1699199459.

9549919961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-9549919961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9549919894 and 9549919903.

It is not an unprimeable number, because it can be changed into a prime (9549919361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214631 + ... + 255276.

It is an arithmetic number, because the mean of its divisors is an integer number (2387602548).

Almost surely, 2^9549919961 is an apocalyptic number.

It is an amenable number.

9549919961 is a deficient number, since it is larger than the sum of its proper divisors (490231).

9549919961 is a wasteful number, since it uses less digits than its factorization.

9549919961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490230.

The product of its digits is 7085880, while the sum is 62.

The square root of 9549919961 is about 97723.6919124528. The cubic root of 9549919961 is about 2121.6150000353.

The spelling of 9549919961 in words is "nine billion, five hundred forty-nine million, nine hundred nineteen thousand, nine hundred sixty-one".