16728174856 has 8 divisors (see below), whose sum is σ = 31365327870. Its totient is φ = 8364087424.

The previous prime is 16728174839. The next prime is 16728174857. The reversal of 16728174856 is 65847182761.

It can be written as a sum of positive squares in only one way, i.e., 9827549956 + 6900624900 = 99134^2 + 83070^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 16728174797 and 16728174806.

It is not an unprimeable number, because it can be changed into a prime (16728174857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045510921 + ... + 1045510936.

Almost surely, 2^16728174856 is an apocalyptic number.

It is an amenable number.

16728174856 is a deficient number, since it is larger than the sum of its proper divisors (14637153014).

16728174856 is a wasteful number, since it uses less digits than its factorization.

16728174856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091021863 (or 2091021859 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 55.

The spelling of 16728174856 in words is "sixteen billion, seven hundred twenty-eight million, one hundred seventy-four thousand, eight hundred fifty-six".