1280413992677 has 2 divisors, whose sum is σ = 1280413992678. Its totient is φ = 1280413992676.

The previous prime is 1280413992667. The next prime is 1280413992707. The reversal of 1280413992677 is 7762993140821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1194635884036 + 85778108641 = 1092994^2 + 292879^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280413992677 - 2²⁰ = 1280412944101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1280413992667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640206996338 + 640206996339.

It is an arithmetic number, because the mean of its divisors is an integer number (640206996339).

Almost surely, 2^{1280413992677} is an apocalyptic number.

It is an amenable number.

1280413992677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280413992677 is an equidigital number, since it uses as much as digits as its factorization.

1280413992677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9144576, while the sum is 59.

The spelling of 1280413992677 in words is "one trillion, two hundred eighty billion, four hundred thirteen million, nine hundred ninety-two thousand, six hundred seventy-seven".