11561170517 has 6 divisors (see below), whose sum is σ = 12518900802. Its totient is φ = 10671849552.

The previous prime is 11561170507. The next prime is 11561170519. The reversal of 11561170517 is 71507116511.

11561170517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 163686436 + 11397484081 = 12794^2 + 106759^2 .

It is not a de Polignac number, because 11561170517 - 2⁸ = 11561170261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11561170519) 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 5 ways as a sum of consecutive naturals, for example, 34204478 + ... + 34204815.

It is an arithmetic number, because the mean of its divisors is an integer number (2086483467).

Almost surely, 2^11561170517 is an apocalyptic number.

It is an amenable number.

11561170517 is a deficient number, since it is larger than the sum of its proper divisors (957730285).

11561170517 is an equidigital number, since it uses as much as digits as its factorization.

11561170517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68409319 (or 68409306 counting only the distinct ones).

The product of its (nonzero) digits is 7350, while the sum is 35.

The spelling of 11561170517 in words is "eleven billion, five hundred sixty-one million, one hundred seventy thousand, five hundred seventeen".