778813000073 has 2 divisors, whose sum is σ = 778813000074. Its totient is φ = 778813000072.

The previous prime is 778813000027. The next prime is 778813000099. The reversal of 778813000073 is 370000318877.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 582242250304 + 196570749769 = 763048^2 + 443363^2 .

It is a cyclic number.

It is not a de Polignac number, because 778813000073 - 2²⁰ = 778811951497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 778812999988 and 778813000033.

It is not a weakly prime, because it can be changed into another prime (778813000013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389406500036 + 389406500037.

It is an arithmetic number, because the mean of its divisors is an integer number (389406500037).

Almost surely, 2^778813000073 is an apocalyptic number.

It is an amenable number.

778813000073 is a deficient number, since it is larger than the sum of its proper divisors (1).

778813000073 is an equidigital number, since it uses as much as digits as its factorization.

778813000073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 197568, while the sum is 44.

The spelling of 778813000073 in words is "seven hundred seventy-eight billion, eight hundred thirteen million, seventy-three", and thus it is an aban number.