16855520367017 has 4 divisors (see below), whose sum is σ = 17107095297936. Its totient is φ = 16603945436100.

The previous prime is 16855520367001. The next prime is 16855520367031. The reversal of 16855520367017 is 71076302555861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16855520367017 - 2⁴ = 16855520367001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16855520337017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125787465359 + ... + 125787465492.

It is an arithmetic number, because the mean of its divisors is an integer number (4276773824484).

Almost surely, 2^{16855520367017} is an apocalyptic number.

It is an amenable number.

16855520367017 is a deficient number, since it is larger than the sum of its proper divisors (251574930919).

16855520367017 is an equidigital number, since it uses as much as digits as its factorization.

16855520367017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251574930918.

The product of its (nonzero) digits is 10584000, while the sum is 56.

The spelling of 16855520367017 in words is "sixteen trillion, eight hundred fifty-five billion, five hundred twenty million, three hundred sixty-seven thousand, seventeen".