16728012907225 has 12 divisors (see below), whose sum is σ = 20747917926736. Its totient is φ = 13379067150480.

The previous prime is 16728012907217. The next prime is 16728012907231. The reversal of 16728012907225 is 52270921082761.

It is not a de Polignac number, because 16728012907225 - 2³ = 16728012907217 is a prime.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83477307 + ... + 83677456.

Almost surely, 2^{16728012907225} is an apocalyptic number.

It is an amenable number.

16728012907225 is a deficient number, since it is larger than the sum of its proper divisors (4019905019511).

16728012907225 is a wasteful number, since it uses less digits than its factorization.

16728012907225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167158776 (or 167158771 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 52.

Adding to 16728012907225 its reverse (52270921082761), we get a palindrome (68998933989986).

The spelling of 16728012907225 in words is "sixteen trillion, seven hundred twenty-eight billion, twelve million, nine hundred seven thousand, two hundred twenty-five".