6378128272 has 30 divisors (see below), whose sum is σ = 13127312018. Its totient is φ = 3001469952.

The previous prime is 6378128233. The next prime is 6378128287. The reversal of 6378128272 is 2728218736.

It can be written as a sum of positive squares in 3 ways, for example, as 4375028736 + 2003099536 = 66144^2 + 44756^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 685053 + ... + 694300.

Almost surely, 2^6378128272 is an apocalyptic number.

It is an amenable number.

6378128272 is an abundant number, since it is smaller than the sum of its proper divisors (6749183746).

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

6378128272 is a wasteful number, since it uses less digits than its factorization.

6378128272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379395 (or 1379372 counting only the distinct ones).

The product of its digits is 451584, while the sum is 46.

The square root of 6378128272 is about 79863.1847098524. The cubic root of 6378128272 is about 1854.5181285536.

The spelling of 6378128272 in words is "six billion, three hundred seventy-eight million, one hundred twenty-eight thousand, two hundred seventy-two".