19369680625 has 45 divisors (see below), whose sum is σ = 25632797223. Its totient is φ = 14630076000.

The previous prime is 19369680623. The next prime is 19369680641. The reversal of 19369680625 is 52608696391.

The square root of 19369680625 is 139175.

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

It can be written as a sum of positive squares in 7 ways, for example, as 4749001569 + 14620679056 = 68913^2 + 120916^2 .

It is not a de Polignac number, because 19369680625 - 2¹ = 19369680623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19369680623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 66107979 + ... + 66108271.

Almost surely, 2^19369680625 is an apocalyptic number.

19369680625 is the 139175-th square number.

19369680625 is the 69588-th centered octagonal number.

It is an amenable number.

19369680625 is a deficient number, since it is larger than the sum of its proper divisors (6263116598).

19369680625 is an frugal number, since it uses more digits than its factorization.

19369680625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 19369680625 in words is "nineteen billion, three hundred sixty-nine million, six hundred eighty thousand, six hundred twenty-five".