16912851685 has 4 divisors (see below), whose sum is σ = 20295422028. Its totient is φ = 13530281344.

The previous prime is 16912851679. The next prime is 16912851689. The reversal of 16912851685 is 58615821961.

It is a happy number.

16912851685 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 can be written as a sum of positive squares in 2 ways, for example, as 2825772964 + 14087078721 = 53158^2 + 118689^2 .

It is a cyclic number.

It is not a de Polignac number, because 16912851685 - 2⁹ = 16912851173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16912851689) by changing a digit.

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, 1691285164 + ... + 1691285173.

It is an arithmetic number, because the mean of its divisors is an integer number (5073855507).

Almost surely, 2^16912851685 is an apocalyptic number.

It is an amenable number.

16912851685 is a deficient number, since it is larger than the sum of its proper divisors (3382570343).

16912851685 is an equidigital number, since it uses as much as digits as its factorization.

16912851685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3382570342.

The product of its digits is 1036800, while the sum is 52.

The spelling of 16912851685 in words is "sixteen billion, nine hundred twelve million, eight hundred fifty-one thousand, six hundred eighty-five".