9885635204449 has 3 divisors (see below), whose sum is σ = 9885638348593. Its totient is φ = 9885632060306.

The previous prime is 9885635204441. The next prime is 9885635204503. The reversal of 9885635204449 is 9444025365889.

The square root of 9885635204449 is 3144143.

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 9885635204449 - 2³ = 9885635204441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9885635204441) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1572072 + ... + 4716214.

Almost surely, 2^{9885635204449} is an apocalyptic number.

9885635204449 is the 3144143-rd square number.

9885635204449 is the 1572072-nd centered octagonal number.

It is an amenable number.

9885635204449 is a deficient number, since it is larger than the sum of its proper divisors (3144144).

9885635204449 is an frugal number, since it uses more digits than its factorization.

9885635204449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6288286 (or 3144143 counting only the distinct ones).

The product of its (nonzero) digits is 298598400, while the sum is 67.

The spelling of 9885635204449 in words is "nine trillion, eight hundred eighty-five billion, six hundred thirty-five million, two hundred four thousand, four hundred forty-nine".