78645183112073 has 2 divisors, whose sum is σ = 78645183112074. Its totient is φ = 78645183112072.

The previous prime is 78645183112061. The next prime is 78645183112087. The reversal of 78645183112073 is 37021138154687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69606182953024 + 9039000159049 = 8343032^2 + 3006493^2 .

It is a cyclic number.

It is not a de Polignac number, because 78645183112073 - 2⁶ = 78645183112009 is a prime.

It is not a weakly prime, because it can be changed into another prime (78645183117073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39322591556036 + 39322591556037.

It is an arithmetic number, because the mean of its divisors is an integer number (39322591556037).

Almost surely, 2^{78645183112073} is an apocalyptic number.

It is an amenable number.

78645183112073 is a deficient number, since it is larger than the sum of its proper divisors (1).

78645183112073 is an equidigital number, since it uses as much as digits as its factorization.

78645183112073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 78645183112073 in words is "seventy-eight trillion, six hundred forty-five billion, one hundred eighty-three million, one hundred twelve thousand, seventy-three".