7278328513 has 2 divisors, whose sum is σ = 7278328514. Its totient is φ = 7278328512.

The previous prime is 7278328511. The next prime is 7278328549. The reversal of 7278328513 is 3158238727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6014312704 + 1264015809 = 77552^2 + 35553^2 .

It is a cyclic number.

It is not a de Polignac number, because 7278328513 - 2¹ = 7278328511 is a prime.

Together with 7278328511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7278328511) 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 as a sum of consecutive naturals, namely, 3639164256 + 3639164257.

It is an arithmetic number, because the mean of its divisors is an integer number (3639164257).

Almost surely, 2^7278328513 is an apocalyptic number.

It is an amenable number.

7278328513 is a deficient number, since it is larger than the sum of its proper divisors (1).

7278328513 is an equidigital number, since it uses as much as digits as its factorization.

7278328513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 46.

The square root of 7278328513 is about 85313.1204036050. The cubic root of 7278328513 is about 1937.9558758458.

The spelling of 7278328513 in words is "seven billion, two hundred seventy-eight million, three hundred twenty-eight thousand, five hundred thirteen".