6728413225 has 6 divisors (see below), whose sum is σ = 8343232430. Its totient is φ = 5382730560.

The previous prime is 6728413189. The next prime is 6728413231. The reversal of 6728413225 is 5223148276.

It can be written as a sum of positive squares in 3 ways, for example, as 939790336 + 5788622889 = 30656^2 + 76083^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6728413225 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 134568240 + ... + 134568289.

Almost surely, 2^6728413225 is an apocalyptic number.

It is an amenable number.

6728413225 is a deficient number, since it is larger than the sum of its proper divisors (1614819205).

6728413225 is a wasteful number, since it uses less digits than its factorization.

6728413225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269136539 (or 269136534 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 6728413225 is about 82026.9054944778. The cubic root of 6728413225 is about 1887.8647839617.

The spelling of 6728413225 in words is "six billion, seven hundred twenty-eight million, four hundred thirteen thousand, two hundred twenty-five".