78852369649 has 2 divisors, whose sum is σ = 78852369650. Its totient is φ = 78852369648.

The previous prime is 78852369529. The next prime is 78852369683. The reversal of 78852369649 is 94696325887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41822295025 + 37030074624 = 204505^2 + 192432^2 .

It is a cyclic number.

It is not a de Polignac number, because 78852369649 - 2¹³ = 78852361457 is a prime.

It is not a weakly prime, because it can be changed into another prime (78852369749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39426184824 + 39426184825.

It is an arithmetic number, because the mean of its divisors is an integer number (39426184825).

Almost surely, 2^78852369649 is an apocalyptic number.

It is an amenable number.

78852369649 is a deficient number, since it is larger than the sum of its proper divisors (1).

78852369649 is an equidigital number, since it uses as much as digits as its factorization.

78852369649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 156764160, while the sum is 67.

The spelling of 78852369649 in words is "seventy-eight billion, eight hundred fifty-two million, three hundred sixty-nine thousand, six hundred forty-nine".