16218992685 has 64 divisors (see below), whose sum is σ = 30995509248. Its totient is φ = 7080927744.

The previous prime is 16218992627. The next prime is 16218992693. The reversal of 16218992685 is 58629981261.

It is a happy number.

16218992685 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 16218992685 - 2¹¹ = 16218990637 is a prime.

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 63 ways as a sum of consecutive naturals, for example, 1644529 + ... + 1654361.

It is an arithmetic number, because the mean of its divisors is an integer number (484304832).

Almost surely, 2^16218992685 is an apocalyptic number.

16218992685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16218992685 is a deficient number, since it is larger than the sum of its proper divisors (14776516563).

16218992685 is a wasteful number, since it uses less digits than its factorization.

16218992685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10554.

The product of its digits is 3732480, while the sum is 57.

The spelling of 16218992685 in words is "sixteen billion, two hundred eighteen million, nine hundred ninety-two thousand, six hundred eighty-five".