11688942138665 has 16 divisors (see below), whose sum is σ = 15320480766336. Its totient is φ = 8490719452800.

The previous prime is 11688942138661. The next prime is 11688942138673. The reversal of 11688942138665 is 56683124988611.

11688942138665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11688942138665 - 2² = 11688942138661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11688942138595 and 11688942138604.

It is not an unprimeable number, because it can be changed into a prime (11688942138661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129071516 + ... + 129162045.

It is an arithmetic number, because the mean of its divisors is an integer number (957530047896).

Almost surely, 2^{11688942138665} is an apocalyptic number.

It is an amenable number.

11688942138665 is a deficient number, since it is larger than the sum of its proper divisors (3631538627671).

11688942138665 is a wasteful number, since it uses less digits than its factorization.

11688942138665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258234400.

The product of its digits is 119439360, while the sum is 68.

The spelling of 11688942138665 in words is "eleven trillion, six hundred eighty-eight billion, nine hundred forty-two million, one hundred thirty-eight thousand, six hundred sixty-five".