16172728907000 has 64 divisors (see below), whose sum is σ = 37848585471840. Its totient is φ = 6468339456000.

The previous prime is 16172728906991. The next prime is 16172728907123. The reversal of 16172728907000 is 70982727161.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a self number, because there is not a number n which added to its sum of digits gives 16172728907000.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 7705187 + ... + 9576813.

Almost surely, 2^{16172728907000} is an apocalyptic number.

16172728907000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16172728907000 is an abundant number, since it is smaller than the sum of its proper divisors (21675856564840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16172728907000 is a wasteful number, since it uses less digits than its factorization.

16172728907000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880289 (or 1880275 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 50.

The spelling of 16172728907000 in words is "sixteen trillion, one hundred seventy-two billion, seven hundred twenty-eight million, nine hundred seven thousand".