11688567642 has 12 divisors (see below), whose sum is σ = 25325229930. Its totient is φ = 3896189208.

The previous prime is 11688567589. The next prime is 11688567659. The reversal of 11688567642 is 24676588611.

11688567642 is a `hidden beast` number, since 1 + 16 + 8 + 8 + 567 + 64 + 2 = 666.

11688567642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10102059081 + 1586508561 = 100509^2 + 39831^2 .

It is a super-2 number, since 2×11688567642² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 324682417 + ... + 324682452.

Almost surely, 2^11688567642 is an apocalyptic number.

11688567642 is an abundant number, since it is smaller than the sum of its proper divisors (13636662288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11688567642 is a wasteful number, since it uses less digits than its factorization.

11688567642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649364877 (or 649364874 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The spelling of 11688567642 in words is "eleven billion, six hundred eighty-eight million, five hundred sixty-seven thousand, six hundred forty-two".