6642447528 has 16 divisors (see below), whose sum is σ = 16606118880. Its totient is φ = 2214149168.

The previous prime is 6642447521. The next prime is 6642447583. The reversal of 6642447528 is 8257442466.

It is not an unprimeable number, because it can be changed into a prime (6642447521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138384300 + ... + 138384347.

It is an arithmetic number, because the mean of its divisors is an integer number (1037882430).

Almost surely, 2^6642447528 is an apocalyptic number.

It is an amenable number.

6642447528 is an abundant number, since it is smaller than the sum of its proper divisors (9963671352).

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

6642447528 is a wasteful number, since it uses less digits than its factorization.

6642447528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276768656 (or 276768652 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 48.

The square root of 6642447528 is about 81501.2118192116. The cubic root of 6642447528 is about 1879.7901840691.

The spelling of 6642447528 in words is "six billion, six hundred forty-two million, four hundred forty-seven thousand, five hundred twenty-eight".