1280679005849 has 2 divisors, whose sum is σ = 1280679005850. Its totient is φ = 1280679005848.

The previous prime is 1280679005813. The next prime is 1280679005863. The reversal of 1280679005849 is 9485009760821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1113643315849 + 167035690000 = 1055293^2 + 408700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280679005849 - 2²⁸ = 1280410570393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1280679005149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640339502924 + 640339502925.

It is an arithmetic number, because the mean of its divisors is an integer number (640339502925).

Almost surely, 2^{1280679005849} is an apocalyptic number.

It is an amenable number.

1280679005849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280679005849 is an equidigital number, since it uses as much as digits as its factorization.

1280679005849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8709120, while the sum is 59.

The spelling of 1280679005849 in words is "one trillion, two hundred eighty billion, six hundred seventy-nine million, five thousand, eight hundred forty-nine".