78968267922769 has 2 divisors, whose sum is σ = 78968267922770. Its totient is φ = 78968267922768.

The previous prime is 78968267922751. The next prime is 78968267922857. The reversal of 78968267922769 is 96722976286987.

It is a happy number.

It is an a-pointer prime, because the next prime (78968267922857) can be obtained adding 78968267922769 to its sum of digits (88).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47936070793744 + 31032197129025 = 6923588^2 + 5570655^2 .

It is a cyclic number.

It is not a de Polignac number, because 78968267922769 - 2¹¹ = 78968267920721 is a prime.

It is a super-2 number, since 2×78968267922769² (a number of 29 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 78968267922769.

It is not a weakly prime, because it can be changed into another prime (78968267992769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39484133961384 + 39484133961385.

It is an arithmetic number, because the mean of its divisors is an integer number (39484133961385).

Almost surely, 2^{78968267922769} is an apocalyptic number.

It is an amenable number.

78968267922769 is a deficient number, since it is larger than the sum of its proper divisors (1).

78968267922769 is an equidigital number, since it uses as much as digits as its factorization.

78968267922769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27653197824, while the sum is 88.

The spelling of 78968267922769 in words is "seventy-eight trillion, nine hundred sixty-eight billion, two hundred sixty-seven million, nine hundred twenty-two thousand, seven hundred sixty-nine".