11669434587511 has 4 divisors (see below), whose sum is σ = 11693201257224. Its totient is φ = 11645667917800.

The previous prime is 11669434587479. The next prime is 11669434587523. The reversal of 11669434587511 is 11578543496611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11669434587511 - 2⁵ = 11669434587479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11669434587511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11669434587541) 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 3 ways as a sum of consecutive naturals, for example, 11883334120 + ... + 11883335101.

It is an arithmetic number, because the mean of its divisors is an integer number (2923300314306).

Almost surely, 2^{11669434587511} is an apocalyptic number.

11669434587511 is a deficient number, since it is larger than the sum of its proper divisors (23766669713).

11669434587511 is an equidigital number, since it uses as much as digits as its factorization.

11669434587511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23766669712.

The product of its digits is 21772800, while the sum is 61.

The spelling of 11669434587511 in words is "eleven trillion, six hundred sixty-nine billion, four hundred thirty-four million, five hundred eighty-seven thousand, five hundred eleven".