11680569 has 6 divisors (see below), whose sum is σ = 16871946. Its totient is φ = 7787040.

The previous prime is 11680519. The next prime is 11680577. The reversal of 11680569 is 96508611.

11680569 is a `hidden beast` number, since 1 + 16 + 80 + 569 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5978025 + 5702544 = 2445^2 + 2388^2 .

It is not a de Polignac number, because 11680569 - 2⁸ = 11680313 is a prime.

It is a super-2 number, since 2×11680569² = 272871384327522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11680519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 648912 + ... + 648929.

It is an arithmetic number, because the mean of its divisors is an integer number (2811991).

Almost surely, 2^11680569 is an apocalyptic number.

It is an amenable number.

11680569 is a deficient number, since it is larger than the sum of its proper divisors (5191377).

11680569 is a wasteful number, since it uses less digits than its factorization.

11680569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297847 (or 1297844 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 11680569 is about 3417.6847426291. The cubic root of 11680569 is about 226.8931231111.

The spelling of 11680569 in words is "eleven million, six hundred eighty thousand, five hundred sixty-nine".