6442559916 has 24 divisors (see below), whose sum is σ = 16188997104. Its totient is φ = 1982326080.

The previous prime is 6442559911. The next prime is 6442559939. The reversal of 6442559916 is 6199552446.

It is not an unprimeable number, because it can be changed into a prime (6442559911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20649075 + ... + 20649386.

It is an arithmetic number, because the mean of its divisors is an integer number (674541546).

Almost surely, 2^6442559916 is an apocalyptic number.

It is an amenable number.

6442559916 is an abundant number, since it is smaller than the sum of its proper divisors (9746437188).

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

6442559916 is a wasteful number, since it uses less digits than its factorization.

6442559916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41298481 (or 41298479 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 51.

The square root of 6442559916 is about 80265.5587160521. The cubic root of 6442559916 is about 1860.7419782272.

The spelling of 6442559916 in words is "six billion, four hundred forty-two million, five hundred fifty-nine thousand, nine hundred sixteen".