6445560416 has 48 divisors (see below), whose sum is σ = 13145963040. Its totient is φ = 3107220480.

The previous prime is 6445560413. The next prime is 6445560439. The reversal of 6445560416 is 6140655446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445560413) 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, 701645 + ... + 710771.

It is an arithmetic number, because the mean of its divisors is an integer number (273874230).

Almost surely, 2^6445560416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6445560416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6572981520).

6445560416 is an abundant number, since it is smaller than the sum of its proper divisors (6700402624).

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

6445560416 is a wasteful number, since it uses less digits than its factorization.

6445560416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9927 (or 9919 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

The square root of 6445560416 is about 80284.2476205638. The cubic root of 6445560416 is about 1861.0308018135.

The spelling of 6445560416 in words is "six billion, four hundred forty-five million, five hundred sixty thousand, four hundred sixteen".