6448071616 has 56 divisors (see below), whose sum is σ = 14697736416. Its totient is φ = 2749393920.

The previous prime is 6448071607. The next prime is 6448071647. The reversal of 6448071616 is 6161708446.

It is a tau number, because it is divible by the number of its divisors (56).

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51726 + ... + 124786.

Almost surely, 2^6448071616 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 6448071616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7348868208).

6448071616 is an abundant number, since it is smaller than the sum of its proper divisors (8249664800).

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

6448071616 is a wasteful number, since it uses less digits than its factorization.

6448071616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73277 (or 73267 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 6448071616 is about 80299.8855291837. The cubic root of 6448071616 is about 1861.2724572299.

The spelling of 6448071616 in words is "six billion, four hundred forty-eight million, seventy-one thousand, six hundred sixteen".