16918350857 has 8 divisors (see below), whose sum is σ = 17051675784. Its totient is φ = 16785497088.

The previous prime is 16918350821. The next prime is 16918350859. The reversal of 16918350857 is 75805381961.

It can be written as a sum of positive squares in 4 ways, for example, as 703893961 + 16214456896 = 26531^2 + 127336^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16918350857 - 2⁸ = 16918350601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16918350799 and 16918350808.

It is not an unprimeable number, because it can be changed into a prime (16918350859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45518 + ... + 189495.

It is an arithmetic number, because the mean of its divisors is an integer number (2131459473).

Almost surely, 2^16918350857 is an apocalyptic number.

It is an amenable number.

16918350857 is a deficient number, since it is larger than the sum of its proper divisors (133324927).

16918350857 is a wasteful number, since it uses less digits than its factorization.

16918350857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235579.

The product of its (nonzero) digits is 1814400, while the sum is 53.

The spelling of 16918350857 in words is "sixteen billion, nine hundred eighteen million, three hundred fifty thousand, eight hundred fifty-seven".