778813000013 has 2 divisors, whose sum is σ = 778813000014. Its totient is φ = 778813000012.

The previous prime is 778812999983. The next prime is 778813000027. The reversal of 778813000013 is 310000318877.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 651576683209 + 127236316804 = 807203^2 + 356702^2 .

It is a cyclic number.

It is not a de Polignac number, because 778813000013 - 2³⁴ = 761633130829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (778813000073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389406500006 + 389406500007.

It is an arithmetic number, because the mean of its divisors is an integer number (389406500007).

Almost surely, 2^778813000013 is an apocalyptic number.

It is an amenable number.

778813000013 is a deficient number, since it is larger than the sum of its proper divisors (1).

778813000013 is an equidigital number, since it uses as much as digits as its factorization.

778813000013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 38.

The spelling of 778813000013 in words is "seven hundred seventy-eight billion, eight hundred thirteen million, thirteen", and thus it is an aban number.