8016643328 has 18 divisors (see below), whose sum is σ = 16001972154. Its totient is φ = 4008321536.

The previous prime is 8016643291. The next prime is 8016643351. The reversal of 8016643328 is 8233466108.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7484326144 + 532317184 = 86512^2 + 23072^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15657251 + ... + 15657762.

It is an arithmetic number, because the mean of its divisors is an integer number (888998453).

Almost surely, 2^8016643328 is an apocalyptic number.

It is an amenable number.

8016643328 is a deficient number, since it is larger than the sum of its proper divisors (7985328826).

8016643328 is an equidigital number, since it uses as much as digits as its factorization.

8016643328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31315029 (or 31315015 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 8016643328 is about 89535.7097922388. The cubic root of 8016643328 is about 2001.3859833033.

The spelling of 8016643328 in words is "eight billion, sixteen million, six hundred forty-three thousand, three hundred twenty-eight".