16562403025 has 27 divisors (see below), whose sum is σ = 23896920369.
Its totient is φ = 11353987680.
The previous prime is 16562403023. The next prime is 16562403029. The reversal of 16562403025 is 52030426561.
Adding to 16562403025 its reverse (52030426561), we get a palindrome (68592829586).
The square root of 16562403025 is 128695.
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 516607441 + 16045795584 = 22729^2 + 126672^2
It is not a de Polignac number, because 16562403025 - 21 = 16562403023 is a prime.
It is not an unprimeable number, because it can be changed into a prime (16562403023) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4502487 + ... + 4506163.
Almost surely, 216562403025 is an apocalyptic number.
16562403025 is the 128695-th square number.
16562403025 is the 64348-th centered octagonal number.
It is an amenable number.
16562403025 is a deficient number, since it is larger than the sum of its proper divisors (7334517344).
16562403025 is an frugal number, since it uses more digits than its factorization.
16562403025 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7378 (or 3689 counting only the distinct ones).
The product of its (nonzero) digits is 43200, while the sum is 34.
The spelling of 16562403025 in words is "sixteen billion, five hundred sixty-two million, four hundred three thousand, twenty-five".