12778876526243 has 2 divisors, whose sum is σ = 12778876526244. Its totient is φ = 12778876526242.

The previous prime is 12778876526233. The next prime is 12778876526279. The reversal of 12778876526243 is 34262567887721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12778876526243 - 2³⁶ = 12710157049507 is a prime.

It is not a weakly prime, because it can be changed into another prime (12778876526233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6389438263121 + 6389438263122.

It is an arithmetic number, because the mean of its divisors is an integer number (6389438263122).

Almost surely, 2^{12778876526243} is an apocalyptic number.

12778876526243 is a deficient number, since it is larger than the sum of its proper divisors (1).

12778876526243 is an equidigital number, since it uses as much as digits as its factorization.

12778876526243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 379330560, while the sum is 68.

The spelling of 12778876526243 in words is "twelve trillion, seven hundred seventy-eight billion, eight hundred seventy-six million, five hundred twenty-six thousand, two hundred forty-three".