9555504661 has 2 divisors, whose sum is σ = 9555504662. Its totient is φ = 9555504660.

The previous prime is 9555504641. The next prime is 9555504667. The reversal of 9555504661 is 1664055559.

9555504661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7084420561 + 2471084100 = 84169^2 + 49710^2 .

It is a cyclic number.

It is not a de Polignac number, because 9555504661 - 2²¹ = 9553407509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9555504667) 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 as a sum of consecutive naturals, namely, 4777752330 + 4777752331.

It is an arithmetic number, because the mean of its divisors is an integer number (4777752331).

Almost surely, 2^9555504661 is an apocalyptic number.

It is an amenable number.

9555504661 is a deficient number, since it is larger than the sum of its proper divisors (1).

9555504661 is an equidigital number, since it uses as much as digits as its factorization.

9555504661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810000, while the sum is 46.

The square root of 9555504661 is about 97752.2616669302. The cubic root of 9555504661 is about 2122.0284860276.

The spelling of 9555504661 in words is "nine billion, five hundred fifty-five million, five hundred four thousand, six hundred sixty-one".