9969143186025 has 81 divisors (see below), whose sum is σ = 18354702815631. Its totient is φ = 5172267674880.

The previous prime is 9969143185921. The next prime is 9969143186033. The reversal of 9969143186025 is 5206813419699.

The square root of 9969143186025 is 3157395.

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

9969143186025 is a `hidden beast` number, since 9 + 9 + 6 + 9 + 1 + 4 + 3 + 18 + 602 + 5 = 666.

It can be written as a sum of positive squares in 13 ways, for example, as 100698963561 + 9868444222464 = 317331^2 + 3141408^2 .

It is not a de Polignac number, because 9969143186025 - 2¹⁷ = 9969143054953 is a prime.

It is an unprimeable number.

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 80 ways as a sum of consecutive naturals, for example, 1752351381 + ... + 1752357069.

Almost surely, 2^{9969143186025} is an apocalyptic number.

9969143186025 is the 3157395-th square number.

9969143186025 is the 1578698-th centered octagonal number.

It is an amenable number.

9969143186025 is a deficient number, since it is larger than the sum of its proper divisors (8385559629606).

9969143186025 is an frugal number, since it uses more digits than its factorization.

9969143186025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11468 (or 5734 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 63.

The spelling of 9969143186025 in words is "nine trillion, nine hundred sixty-nine billion, one hundred forty-three million, one hundred eighty-six thousand, twenty-five".