9865544442 has 16 divisors (see below), whose sum is σ = 21248865120. Its totient is φ = 3035552112.

The previous prime is 9865544413. The next prime is 9865544449. The reversal of 9865544442 is 2444455689.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9865544449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63240592 + ... + 63240747.

It is an arithmetic number, because the mean of its divisors is an integer number (1328054070).

Almost surely, 2^9865544442 is an apocalyptic number.

9865544442 is an abundant number, since it is smaller than the sum of its proper divisors (11383320678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9865544442 is a wasteful number, since it uses less digits than its factorization.

9865544442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126481357.

The product of its digits is 5529600, while the sum is 51.

The square root of 9865544442 is about 99325.4471019386. The cubic root of 9865544442 is about 2144.7352304400.

The spelling of 9865544442 in words is "nine billion, eight hundred sixty-five million, five hundred forty-four thousand, four hundred forty-two".