9844209822640 has 40 divisors (see below), whose sum is σ = 22888485654768. Its totient is φ = 3937563874560.

The previous prime is 9844209822617. The next prime is 9844209822647. The reversal of 9844209822640 is 462289024489.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (9844209822647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 787974 + ... + 4506586.

Almost surely, 2^{9844209822640} is an apocalyptic number.

It is an amenable number.

9844209822640 is an abundant number, since it is smaller than the sum of its proper divisors (13044275832128).

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

9844209822640 is a wasteful number, since it uses less digits than its factorization.

9844209822640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3751717 (or 3751711 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 58.

The spelling of 9844209822640 in words is "nine trillion, eight hundred forty-four billion, two hundred nine million, eight hundred twenty-two thousand, six hundred forty".