16636608488485 has 4 divisors (see below), whose sum is σ = 19963930186188. Its totient is φ = 13309286790784.

The previous prime is 16636608488459. The next prime is 16636608488551. The reversal of 16636608488485 is 58488480663661.

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 5258555267716 + 11378053220769 = 2293154^2 + 3373137^2 .

It is a cyclic number.

It is not a de Polignac number, because 16636608488485 - 2⁵ = 16636608488453 is a prime.

It is a Duffinian number.

It is a congruent 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, 1663660848844 + ... + 1663660848853.

It is an arithmetic number, because the mean of its divisors is an integer number (4990982546547).

Almost surely, 2^{16636608488485} is an apocalyptic number.

It is an amenable number.

16636608488485 is a deficient number, since it is larger than the sum of its proper divisors (3327321697703).

16636608488485 is an equidigital number, since it uses as much as digits as its factorization.

16636608488485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3327321697702.

The product of its (nonzero) digits is 1274019840, while the sum is 73.

The spelling of 16636608488485 in words is "sixteen trillion, six hundred thirty-six billion, six hundred eight million, four hundred eighty-eight thousand, four hundred eighty-five".