16078446007221 has 32 divisors (see below), whose sum is σ = 23209822161792. Its totient is φ = 9841844194560.

The previous prime is 16078446007213. The next prime is 16078446007223. The reversal of 16078446007221 is 12270064487061.

16078446007221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16078446007221 - 2³ = 16078446007213 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16078446007223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13697131 + ... + 14824583.

It is an arithmetic number, because the mean of its divisors is an integer number (725306942556).

Almost surely, 2^{16078446007221} is an apocalyptic number.

It is an amenable number.

16078446007221 is a deficient number, since it is larger than the sum of its proper divisors (7131376154571).

16078446007221 is a wasteful number, since it uses less digits than its factorization.

16078446007221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129413.

The product of its (nonzero) digits is 903168, while the sum is 48.

The spelling of 16078446007221 in words is "sixteen trillion, seventy-eight billion, four hundred forty-six million, seven thousand, two hundred twenty-one".