9825209361361 has 3 divisors (see below), whose sum is σ = 9825212495881. Its totient is φ = 9825206226842.

The previous prime is 9825209361301. The next prime is 9825209361379. The reversal of 9825209361361 is 1631639025289.

The square root of 9825209361361 is 3134519.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 9825209361361 - 2⁹ = 9825209360849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9825209361301) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 1567260 + ... + 4701778.

Almost surely, 2^{9825209361361} is an apocalyptic number.

9825209361361 is the 3134519-th square number.

9825209361361 is the 1567260-th centered octagonal number.

It is an amenable number.

9825209361361 is a deficient number, since it is larger than the sum of its proper divisors (3134520).

9825209361361 is an frugal number, since it uses more digits than its factorization.

9825209361361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6269038 (or 3134519 counting only the distinct ones).

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

The spelling of 9825209361361 in words is "nine trillion, eight hundred twenty-five billion, two hundred nine million, three hundred sixty-one thousand, three hundred sixty-one".