11569637607889 has 3 divisors (see below), whose sum is σ = 11569641009307. Its totient is φ = 11569634206472.

The previous prime is 11569637607883. The next prime is 11569637607893. The reversal of 11569637607889 is 98870673696511.

The square root of 11569637607889 is 3401417.

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 can be written as a sum of positive squares in only one way, i.e., 184465955025 + 11385171652864 = 429495^2 + 3374192^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11569637607889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11569637607883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1700709 + ... + 5102125.

Almost surely, 2^{11569637607889} is an apocalyptic number.

11569637607889 is the 3401417-th square number.

11569637607889 is the 1700709-th centered octagonal number.

It is an amenable number.

11569637607889 is a deficient number, since it is larger than the sum of its proper divisors (3401418).

11569637607889 is an frugal number, since it uses more digits than its factorization.

11569637607889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6802834 (or 3401417 counting only the distinct ones).

The product of its (nonzero) digits is 823011840, while the sum is 76.

The spelling of 11569637607889 in words is "eleven trillion, five hundred sixty-nine billion, six hundred thirty-seven million, six hundred seven thousand, eight hundred eighty-nine".