16655681918 has 4 divisors (see below), whose sum is σ = 24983522880. Its totient is φ = 8327840958.

The previous prime is 16655681849. The next prime is 16655682031. The reversal of 16655681918 is 81918655661.

16655681918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

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 as a sum of consecutive naturals, namely, 4163920478 + ... + 4163920481.

It is an arithmetic number, because the mean of its divisors is an integer number (6245880720).

Almost surely, 2^16655681918 is an apocalyptic number.

16655681918 is a deficient number, since it is larger than the sum of its proper divisors (8327840962).

16655681918 is an equidigital number, since it uses as much as digits as its factorization.

16655681918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8327840961.

The product of its digits is 3110400, while the sum is 56.

The spelling of 16655681918 in words is "sixteen billion, six hundred fifty-five million, six hundred eighty-one thousand, nine hundred eighteen".