16094728225 has 9 divisors (see below), whose sum is σ = 19958249593. Its totient is φ = 12875275120.

The previous prime is 16094728219. The next prime is 16094728229. The reversal of 16094728225 is 52282749061.

The square root of 16094728225 is 126865.

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

It can be written as a sum of positive squares in 4 ways, for example, as 8757777889 + 7336950336 = 93583^2 + 85656^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16094728225 is a prime.

It is a super-2 number, since 2×16094728225² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16094728229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 621639 + ... + 647011.

Almost surely, 2^16094728225 is an apocalyptic number.

16094728225 is the 126865-th square number.

16094728225 is the 63433-rd centered octagonal number.

It is an amenable number.

16094728225 is a deficient number, since it is larger than the sum of its proper divisors (3863521368).

16094728225 is an frugal number, since it uses more digits than its factorization.

16094728225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50756 (or 25378 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 16094728225 in words is "sixteen billion, ninety-four million, seven hundred twenty-eight thousand, two hundred twenty-five".