78946805224069 has 2 divisors, whose sum is σ = 78946805224070. Its totient is φ = 78946805224068.

The previous prime is 78946805224031. The next prime is 78946805224169. The reversal of 78946805224069 is 96042250864987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53810469855844 + 25136335368225 = 7335562^2 + 5013615^2 .

It is a cyclic number.

It is not a de Polignac number, because 78946805224069 - 2²⁵ = 78946771669637 is a prime.

It is a super-2 number, since 2×78946805224069² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78946805223989 and 78946805224007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78946805224169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39473402612034 + 39473402612035.

It is an arithmetic number, because the mean of its divisors is an integer number (39473402612035).

Almost surely, 2^{78946805224069} is an apocalyptic number.

It is an amenable number.

78946805224069 is a deficient number, since it is larger than the sum of its proper divisors (1).

78946805224069 is an equidigital number, since it uses as much as digits as its factorization.

78946805224069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 418037760, while the sum is 70.

The spelling of 78946805224069 in words is "seventy-eight trillion, nine hundred forty-six billion, eight hundred five million, two hundred twenty-four thousand, sixty-nine".