16728082405 has 8 divisors (see below), whose sum is σ = 20106236952. Its totient is φ = 13360773888.

The previous prime is 16728082379. The next prime is 16728082421. The reversal of 16728082405 is 50428082761.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2353511169 + 14374571236 = 48513^2 + 119894^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16728082405 - 2⁹ = 16728081893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2708112 + ... + 2714281.

It is an arithmetic number, because the mean of its divisors is an integer number (2513279619).

Almost surely, 2^16728082405 is an apocalyptic number.

It is an amenable number.

16728082405 is a deficient number, since it is larger than the sum of its proper divisors (3378154547).

16728082405 is an equidigital number, since it uses as much as digits as its factorization.

16728082405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5423015.

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 16728082405 in words is "sixteen billion, seven hundred twenty-eight million, eighty-two thousand, four hundred five".