78795618197 has 2 divisors, whose sum is σ = 78795618198. Its totient is φ = 78795618196.

The previous prime is 78795618119. The next prime is 78795618221. The reversal of 78795618197 is 79181659787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78694836676 + 100781521 = 280526^2 + 10039^2 .

It is a cyclic number.

It is not a de Polignac number, because 78795618197 - 2²⁰ = 78794569621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78795618397) 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, 39397809098 + 39397809099.

It is an arithmetic number, because the mean of its divisors is an integer number (39397809099).

Almost surely, 2^78795618197 is an apocalyptic number.

It is an amenable number.

78795618197 is a deficient number, since it is larger than the sum of its proper divisors (1).

78795618197 is an equidigital number, since it uses as much as digits as its factorization.

78795618197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53343360, while the sum is 68.

The spelling of 78795618197 in words is "seventy-eight billion, seven hundred ninety-five million, six hundred eighteen thousand, one hundred ninety-seven".