12257891126779 has 2 divisors, whose sum is σ = 12257891126780. Its totient is φ = 12257891126778.

The previous prime is 12257891126771. The next prime is 12257891126809. The reversal of 12257891126779 is 97762119875221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12257891126779 - 2³ = 12257891126771 is a prime.

It is not a weakly prime, because it can be changed into another prime (12257891126771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6128945563389 + 6128945563390.

It is an arithmetic number, because the mean of its divisors is an integer number (6128945563390).

Almost surely, 2^{12257891126779} is an apocalyptic number.

12257891126779 is a deficient number, since it is larger than the sum of its proper divisors (1).

12257891126779 is an equidigital number, since it uses as much as digits as its factorization.

12257891126779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53343360, while the sum is 67.

The spelling of 12257891126779 in words is "twelve trillion, two hundred fifty-seven billion, eight hundred ninety-one million, one hundred twenty-six thousand, seven hundred seventy-nine".