78895600813 has 2 divisors, whose sum is σ = 78895600814. Its totient is φ = 78895600812.

The previous prime is 78895600793. The next prime is 78895600831. The reversal of 78895600813 is 31800659887.

Together with next prime (78895600831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50401148004 + 28494452809 = 224502^2 + 168803^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78895600813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78895600213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39447800406 + 39447800407.

It is an arithmetic number, because the mean of its divisors is an integer number (39447800407).

Almost surely, 2^78895600813 is an apocalyptic number.

It is an amenable number.

78895600813 is a deficient number, since it is larger than the sum of its proper divisors (1).

78895600813 is an equidigital number, since it uses as much as digits as its factorization.

78895600813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 78895600813 in words is "seventy-eight billion, eight hundred ninety-five million, six hundred thousand, eight hundred thirteen".