108991236656 has 10 divisors (see below), whose sum is σ = 211170521052. Its totient is φ = 54495618320.

The previous prime is 108991236617. The next prime is 108991236721. The reversal of 108991236656 is 656632199801.

108991236656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3405976130 + ... + 3405976161.

Almost surely, 2^108991236656 is an apocalyptic number.

108991236656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

108991236656 is a deficient number, since it is larger than the sum of its proper divisors (102179284396).

108991236656 is an equidigital number, since it uses as much as digits as its factorization.

108991236656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6811952299 (or 6811952293 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 56.

The spelling of 108991236656 in words is "one hundred eight billion, nine hundred ninety-one million, two hundred thirty-six thousand, six hundred fifty-six".