16928747521 has 12 divisors (see below), whose sum is σ = 19830544576. Its totient is φ = 14156434080.

The previous prime is 16928747519. The next prime is 16928747527. The reversal of 16928747521 is 12574782961.

It is not a de Polignac number, because 16928747521 - 2¹ = 16928747519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16928747527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 707565 + ... + 731098.

Almost surely, 2^16928747521 is an apocalyptic number.

It is an amenable number.

16928747521 is a deficient number, since it is larger than the sum of its proper divisors (2901797055).

16928747521 is an equidigital number, since it uses as much as digits as its factorization.

16928747521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438752 (or 1438711 counting only the distinct ones).

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

The spelling of 16928747521 in words is "sixteen billion, nine hundred twenty-eight million, seven hundred forty-seven thousand, five hundred twenty-one".