78318014197 has 2 divisors, whose sum is σ = 78318014198. Its totient is φ = 78318014196.

The previous prime is 78318014167. The next prime is 78318014213. The reversal of 78318014197 is 79141081387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43226983921 + 35091030276 = 207911^2 + 187326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78318014197 is a prime.

It is a super-2 number, since 2×78318014197² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78318014197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78318014167) 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, 39159007098 + 39159007099.

It is an arithmetic number, because the mean of its divisors is an integer number (39159007099).

Almost surely, 2^78318014197 is an apocalyptic number.

It is an amenable number.

78318014197 is a deficient number, since it is larger than the sum of its proper divisors (1).

78318014197 is an equidigital number, since it uses as much as digits as its factorization.

78318014197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 49.

The spelling of 78318014197 in words is "seventy-eight billion, three hundred eighteen million, fourteen thousand, one hundred ninety-seven".