989443646441 has 8 divisors (see below), whose sum is σ = 1023996728520. Its totient is φ = 954919520128.

The previous prime is 989443646381. The next prime is 989443646449. The reversal of 989443646441 is 144646344989.

It can be written as a sum of positive squares in 4 ways, for example, as 6212750041 + 983230896400 = 78821^2 + 991580^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 989443646441 - 2¹⁸ = 989443384297 is a prime.

It is a super-2 number, since 2×989443646441² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989443646449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7169396 + ... + 7306101.

It is an arithmetic number, because the mean of its divisors is an integer number (127999591065).

Almost surely, 2^989443646441 is an apocalyptic number.

It is an amenable number.

989443646441 is a deficient number, since it is larger than the sum of its proper divisors (34553082079).

989443646441 is a wasteful number, since it uses less digits than its factorization.

989443646441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14477883.

The product of its digits is 71663616, while the sum is 62.

The spelling of 989443646441 in words is "nine hundred eighty-nine billion, four hundred forty-three million, six hundred forty-six thousand, four hundred forty-one".