6442521676 has 24 divisors (see below), whose sum is σ = 11413377360. Its totient is φ = 3181635072.

The previous prime is 6442521647. The next prime is 6442521707. The reversal of 6442521676 is 6761252446.

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, 338551 + ... + 357073.

It is an arithmetic number, because the mean of its divisors is an integer number (475557390).

Almost surely, 2^6442521676 is an apocalyptic number.

It is an amenable number.

6442521676 is a deficient number, since it is larger than the sum of its proper divisors (4970855684).

6442521676 is a wasteful number, since it uses less digits than its factorization.

6442521676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19593 (or 19591 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The square root of 6442521676 is about 80265.3205064304. The cubic root of 6442521676 is about 1860.7382967241.

The spelling of 6442521676 in words is "six billion, four hundred forty-two million, five hundred twenty-one thousand, six hundred seventy-six".