9611128564 has 18 divisors (see below), whose sum is σ = 16866486294. Its totient is φ = 4792142880.

The previous prime is 9611128543. The next prime is 9611128567. The reversal of 9611128564 is 4658211169.

It can be written as a sum of positive squares in 3 ways, for example, as 606636900 + 9004491664 = 24630^2 + 94892^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9611128564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9611128567) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4021882 + ... + 4024270.

Almost surely, 2^9611128564 is an apocalyptic number.

It is an amenable number.

9611128564 is a deficient number, since it is larger than the sum of its proper divisors (7255357730).

9611128564 is an equidigital number, since it uses as much as digits as its factorization.

9611128564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5203 (or 2812 counting only the distinct ones).

The product of its digits is 103680, while the sum is 43.

The square root of 9611128564 is about 98036.3634780483. The cubic root of 9611128564 is about 2126.1380617835.

The spelling of 9611128564 in words is "nine billion, six hundred eleven million, one hundred twenty-eight thousand, five hundred sixty-four".