16687435660205 has 8 divisors (see below), whose sum is σ = 21202859427192. Its totient is φ = 12564657438208.

The previous prime is 16687435660153. The next prime is 16687435660223. The reversal of 16687435660205 is 50206653478661.

It can be written as a sum of positive squares in 4 ways, for example, as 2875947923044 + 13811487737161 = 1695862^2 + 3716381^2 .

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 16687435660205 - 2¹⁴ = 16687435643821 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 7 ways as a sum of consecutive naturals, for example, 98161386152 + ... + 98161386321.

It is an arithmetic number, because the mean of its divisors is an integer number (2650357428399).

Almost surely, 2^{16687435660205} is an apocalyptic number.

It is an amenable number.

16687435660205 is a deficient number, since it is larger than the sum of its proper divisors (4515423766987).

16687435660205 is a wasteful number, since it uses less digits than its factorization.

16687435660205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196322772495.

The product of its (nonzero) digits is 43545600, while the sum is 59.

The spelling of 16687435660205 in words is "sixteen trillion, six hundred eighty-seven billion, four hundred thirty-five million, six hundred sixty thousand, two hundred five".