16780288140625 has 21 divisors (see below), whose sum is σ = 20975731761103. Its totient is φ = 13423820875000.

The previous prime is 16780288140619. The next prime is 16780288140641. The reversal of 16780288140625 is 52604188208761.

The square root of 16780288140625 is 4096375.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 3 ways, for example, as 14701143318849 + 2079144821776 = 3834207^2 + 1441924^2 .

It is not a de Polignac number, because 16780288140625 - 2⁵ = 16780288140593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16780288140625.

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 20 ways as a sum of consecutive naturals, for example, 512030490 + ... + 512063260.

Almost surely, 2^{16780288140625} is an apocalyptic number.

16780288140625 is the 4096375-th square number.

16780288140625 is the 2048188-th centered octagonal number.

It is an amenable number.

16780288140625 is a deficient number, since it is larger than the sum of its proper divisors (4195443620478).

16780288140625 is an frugal number, since it uses more digits than its factorization.

16780288140625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65572 (or 32776 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 58.

The spelling of 16780288140625 in words is "sixteen trillion, seven hundred eighty billion, two hundred eighty-eight million, one hundred forty thousand, six hundred twenty-five".