78836428241 has 2 divisors, whose sum is σ = 78836428242. Its totient is φ = 78836428240.

The previous prime is 78836428217. The next prime is 78836428267. The reversal of 78836428241 is 14282463887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69748810000 + 9087618241 = 264100^2 + 95329^2 .

It is an emirp because it is prime and its reverse (14282463887) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78836428241 is a prime.

It is not a weakly prime, because it can be changed into another prime (78836428141) 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, 39418214120 + 39418214121.

It is an arithmetic number, because the mean of its divisors is an integer number (39418214121).

Almost surely, 2^78836428241 is an apocalyptic number.

It is an amenable number.

78836428241 is a deficient number, since it is larger than the sum of its proper divisors (1).

78836428241 is an equidigital number, since it uses as much as digits as its factorization.

78836428241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4128768, while the sum is 53.

The spelling of 78836428241 in words is "seventy-eight billion, eight hundred thirty-six million, four hundred twenty-eight thousand, two hundred forty-one".