109555987686 has 8 divisors (see below), whose sum is σ = 219111975384. Its totient is φ = 36518662560.

The previous prime is 109555987661. The next prime is 109555987757. The reversal of 109555987686 is 686789555901.

It is a happy number.

109555987686 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

109555987686 is an admirable number.

It is a super-3 number, since 3×109555987686³ (a number of 34 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 109555987686.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 9129665635 + ... + 9129665646.

It is an arithmetic number, because the mean of its divisors is an integer number (27388996923).

Almost surely, 2^109555987686 is an apocalyptic number.

109555987686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

109555987686 is a wasteful number, since it uses less digits than its factorization.

109555987686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18259331286.

The product of its (nonzero) digits is 163296000, while the sum is 69.

The spelling of 109555987686 in words is "one hundred nine billion, five hundred fifty-five million, nine hundred eighty-seven thousand, six hundred eighty-six".