9825399905889 has 4 divisors (see below), whose sum is σ = 13100533207856. Its totient is φ = 6550266603924.

The previous prime is 9825399905879. The next prime is 9825399905897. The reversal of 9825399905889 is 9885099935289.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9825399905889 - 2⁴ = 9825399905873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9825399905809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1637566650979 + ... + 1637566650984.

It is an arithmetic number, because the mean of its divisors is an integer number (3275133301964).

Almost surely, 2^{9825399905889} is an apocalyptic number.

It is an amenable number.

9825399905889 is a deficient number, since it is larger than the sum of its proper divisors (3275133301967).

9825399905889 is a wasteful number, since it uses less digits than its factorization.

9825399905889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3275133301966.

The product of its (nonzero) digits is 4534963200, while the sum is 84.

The spelling of 9825399905889 in words is "nine trillion, eight hundred twenty-five billion, three hundred ninety-nine million, nine hundred five thousand, eight hundred eighty-nine".