11530527209569 has 3 divisors (see below), whose sum is σ = 11530530605233. Its totient is φ = 11530523813906.

The previous prime is 11530527209549. The next prime is 11530527209587. The reversal of 11530527209569 is 96590272503511.

The square root of 11530527209569 is 3395663.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 11530527209569 - 2³⁹ = 10980771395681 is a prime.

It is a super-2 number, since 2×11530527209569² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11530527209549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1697832 + ... + 5093494.

Almost surely, 2^{11530527209569} is an apocalyptic number.

11530527209569 is the 3395663-rd square number.

11530527209569 is the 1697832-nd centered octagonal number.

It is an amenable number.

11530527209569 is a deficient number, since it is larger than the sum of its proper divisors (3395664).

11530527209569 is an frugal number, since it uses more digits than its factorization.

11530527209569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6791326 (or 3395663 counting only the distinct ones).

The product of its (nonzero) digits is 5103000, while the sum is 55.

The spelling of 11530527209569 in words is "eleven trillion, five hundred thirty billion, five hundred twenty-seven million, two hundred nine thousand, five hundred sixty-nine".