9921446744 has 32 divisors (see below), whose sum is σ = 20343560400. Its totient is φ = 4498705920.

The previous prime is 9921446741. The next prime is 9921446747. The reversal of 9921446744 is 4476441299.

9921446744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9921446741) and next prime (9921446747).

It is a junction number, because it is equal to n+sod(n) for n = 9921446692 and 9921446701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9921446741) 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, 101837 + ... + 173820.

Almost surely, 2^9921446744 is an apocalyptic number.

It is an amenable number.

9921446744 is an abundant number, since it is smaller than the sum of its proper divisors (10422113656).

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

9921446744 is a wasteful number, since it uses less digits than its factorization.

9921446744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276083 (or 276079 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 50.

The square root of 9921446744 is about 99606.4593487792. The cubic root of 9921446744 is about 2148.7785919213.

Subtracting from 9921446744 its reverse (4476441299), we obtain a palindrome (5445005445).

The spelling of 9921446744 in words is "nine billion, nine hundred twenty-one million, four hundred forty-six thousand, seven hundred forty-four".