9566120561 has 2 divisors, whose sum is σ = 9566120562. Its totient is φ = 9566120560.

The previous prime is 9566120527. The next prime is 9566120579. The reversal of 9566120561 is 1650216659.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5601025600 + 3965094961 = 74840^2 + 62969^2 .

It is a cyclic number.

It is not a de Polignac number, because 9566120561 - 2⁶ = 9566120497 is a prime.

It is not a weakly prime, because it can be changed into another prime (9566120521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4783060280 + 4783060281.

It is an arithmetic number, because the mean of its divisors is an integer number (4783060281).

Almost surely, 2^9566120561 is an apocalyptic number.

It is an amenable number.

9566120561 is a deficient number, since it is larger than the sum of its proper divisors (1).

9566120561 is an equidigital number, since it uses as much as digits as its factorization.

9566120561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 9566120561 is about 97806.5466162670. The cubic root of 9566120561 is about 2122.8140334082.

The spelling of 9566120561 in words is "nine billion, five hundred sixty-six million, one hundred twenty thousand, five hundred sixty-one".