16720858114585 has 4 divisors (see below), whose sum is σ = 20065029737508. Its totient is φ = 13376686491664.

The previous prime is 16720858114579. The next prime is 16720858114601. The reversal of 16720858114585 is 58541185802761.

16720858114585 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 2007404415241 + 14713453699344 = 1416829^2 + 3835812^2 .

It is a cyclic number.

It is not a de Polignac number, because 16720858114585 - 2⁵ = 16720858114553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1672085811454 + ... + 1672085811463.

It is an arithmetic number, because the mean of its divisors is an integer number (5016257434377).

Almost surely, 2^{16720858114585} is an apocalyptic number.

It is an amenable number.

16720858114585 is a deficient number, since it is larger than the sum of its proper divisors (3344171622923).

16720858114585 is an equidigital number, since it uses as much as digits as its factorization.

16720858114585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3344171622922.

The product of its (nonzero) digits is 21504000, while the sum is 61.

The spelling of 16720858114585 in words is "sixteen trillion, seven hundred twenty billion, eight hundred fifty-eight million, one hundred fourteen thousand, five hundred eighty-five".