4447991907216 has 600 divisors, whose sum is σ = 15261082407032. Its totient is φ = 1242393292800.

The previous prime is 4447991907187. The next prime is 4447991907221. The reversal of 4447991907216 is 6127091997444.

4447991907216 is a `hidden beast` number, since 4 + 4 + 479 + 9 + 1 + 90 + 72 + 1 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9722748816 + 4438269158400 = 98604^2 + 2106720^2 .

It is an unprimeable number.

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 119 ways as a sum of consecutive naturals, for example, 2081417700 + ... + 2081419836.

Almost surely, 2^{4447991907216} 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 4447991907216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7630541203516).

4447991907216 is an abundant number, since it is smaller than the sum of its proper divisors (10813090499816).

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

4447991907216 is a wasteful number, since it uses less digits than its factorization.

4447991907216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213 (or 3187 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 63.

The spelling of 4447991907216 in words is "four trillion, four hundred forty-seven billion, nine hundred ninety-one million, nine hundred seven thousand, two hundred sixteen".