28078275613 has 2 divisors, whose sum is σ = 28078275614. Its totient is φ = 28078275612.

The previous prime is 28078275611. The next prime is 28078275619. The reversal of 28078275613 is 31657287082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23454003609 + 4624272004 = 153147^2 + 68002^2 .

It is a cyclic number.

It is not a de Polignac number, because 28078275613 - 2¹ = 28078275611 is a prime.

It is a super-2 number, since 2×28078275613² (a number of 22 digits) contains 22 as substring.

Together with 28078275611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28078275611) 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, 14039137806 + 14039137807.

It is an arithmetic number, because the mean of its divisors is an integer number (14039137807).

Almost surely, 2^28078275613 is an apocalyptic number.

It is an amenable number.

28078275613 is a deficient number, since it is larger than the sum of its proper divisors (1).

28078275613 is an equidigital number, since it uses as much as digits as its factorization.

28078275613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 28078275613 in words is "twenty-eight billion, seventy-eight million, two hundred seventy-five thousand, six hundred thirteen".