78625533193 has 2 divisors, whose sum is σ = 78625533194. Its totient is φ = 78625533192.

The previous prime is 78625533139. The next prime is 78625533241. The reversal of 78625533193 is 39133552687.

Together with previous prime (78625533139) 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., 39663510649 + 38962022544 = 199157^2 + 197388^2 .

It is a cyclic number.

It is not a de Polignac number, because 78625533193 - 2⁹ = 78625532681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78625533193.

It is not a weakly prime, because it can be changed into another prime (78625533293) 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, 39312766596 + 39312766597.

It is an arithmetic number, because the mean of its divisors is an integer number (39312766597).

Almost surely, 2^78625533193 is an apocalyptic number.

It is an amenable number.

78625533193 is a deficient number, since it is larger than the sum of its proper divisors (1).

78625533193 is an equidigital number, since it uses as much as digits as its factorization.

78625533193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4082400, while the sum is 52.

The spelling of 78625533193 in words is "seventy-eight billion, six hundred twenty-five million, five hundred thirty-three thousand, one hundred ninety-three".