12778554293 has 2 divisors, whose sum is σ = 12778554294. Its totient is φ = 12778554292.

The previous prime is 12778554233. The next prime is 12778554301. The reversal of 12778554293 is 39245587721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12769452004 + 9102289 = 113002^2 + 3017^2 .

It is a cyclic number.

It is not a de Polignac number, because 12778554293 - 2¹⁰ = 12778553269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12778554223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6389277146 + 6389277147.

It is an arithmetic number, because the mean of its divisors is an integer number (6389277147).

Almost surely, 2^12778554293 is an apocalyptic number.

It is an amenable number.

12778554293 is a deficient number, since it is larger than the sum of its proper divisors (1).

12778554293 is an equidigital number, since it uses as much as digits as its factorization.

12778554293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4233600, while the sum is 53.

The spelling of 12778554293 in words is "twelve billion, seven hundred seventy-eight million, five hundred fifty-four thousand, two hundred ninety-three".