6468628138 has 32 divisors (see below), whose sum is σ = 11379811968. Its totient is φ = 2699827200.

The previous prime is 6468628081. The next prime is 6468628181. The reversal of 6468628138 is 8318268646.

It is a super-3 number, since 3×6468628138³ (a number of 30 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 321433 + ... + 340963.

It is an arithmetic number, because the mean of its divisors is an integer number (355619124).

Almost surely, 2^6468628138 is an apocalyptic number.

6468628138 is a deficient number, since it is larger than the sum of its proper divisors (4911183830).

6468628138 is a wasteful number, since it uses less digits than its factorization.

6468628138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20158.

The product of its digits is 2654208, while the sum is 52.

The square root of 6468628138 is about 80427.7821278195. The cubic root of 6468628138 is about 1863.2482779722.

The spelling of 6468628138 in words is "six billion, four hundred sixty-eight million, six hundred twenty-eight thousand, one hundred thirty-eight".