6128828665 has 4 divisors (see below), whose sum is σ = 7354594404. Its totient is φ = 4903062928.

The previous prime is 6128828633. The next prime is 6128828669. The reversal of 6128828665 is 5668288216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1059958249 + 5068870416 = 32557^2 + 71196^2 .

It is a cyclic number.

It is not a de Polignac number, because 6128828665 - 2⁵ = 6128828633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6128828669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612882862 + ... + 612882871.

It is an arithmetic number, because the mean of its divisors is an integer number (1838648601).

Almost surely, 2^6128828665 is an apocalyptic number.

It is an amenable number.

6128828665 is a deficient number, since it is larger than the sum of its proper divisors (1225765739).

6128828665 is a wasteful number, since it uses less digits than its factorization.

6128828665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225765738.

The product of its digits is 2211840, while the sum is 52.

The square root of 6128828665 is about 78286.8358346408. The cubic root of 6128828665 is about 1830.0340070522.

The spelling of 6128828665 in words is "six billion, one hundred twenty-eight million, eight hundred twenty-eight thousand, six hundred sixty-five".