6728944451 has 2 divisors, whose sum is σ = 6728944452. Its totient is φ = 6728944450.

The previous prime is 6728944427. The next prime is 6728944499. The reversal of 6728944451 is 1544498276.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6728944451 - 2²² = 6724750147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6728944451.

It is not a weakly prime, because it can be changed into another prime (6728946451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3364472225 + 3364472226.

It is an arithmetic number, because the mean of its divisors is an integer number (3364472226).

Almost surely, 2^6728944451 is an apocalyptic number.

6728944451 is a deficient number, since it is larger than the sum of its proper divisors (1).

6728944451 is an equidigital number, since it uses as much as digits as its factorization.

6728944451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1935360, while the sum is 50.

The square root of 6728944451 is about 82030.1435510142. The cubic root of 6728944451 is about 1887.9144666249.

The spelling of 6728944451 in words is "six billion, seven hundred twenty-eight million, nine hundred forty-four thousand, four hundred fifty-one".