6728312506 has 8 divisors (see below), whose sum is σ = 10095604020. Its totient is φ = 3363111168.

The previous prime is 6728312501. The next prime is 6728312519. The reversal of 6728312506 is 6052138276.

It can be written as a sum of positive squares in 2 ways, for example, as 6709084281 + 19228225 = 81909^2 + 4385^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (6728312501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514471 + ... + 527386.

Almost surely, 2^6728312506 is an apocalyptic number.

6728312506 is a deficient number, since it is larger than the sum of its proper divisors (3367291514).

6728312506 is a wasteful number, since it uses less digits than its factorization.

6728312506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045088.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 6728312506 is about 82026.2915533794. The cubic root of 6728312506 is about 1887.8553639694.

The spelling of 6728312506 in words is "six billion, seven hundred twenty-eight million, three hundred twelve thousand, five hundred six".