280780868287 has 2 divisors, whose sum is σ = 280780868288. Its totient is φ = 280780868286.

The previous prime is 280780868267. The next prime is 280780868309. The reversal of 280780868287 is 782868087082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280780868287 - 2¹¹ = 280780866239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280780868267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140390434143 + 140390434144.

It is an arithmetic number, because the mean of its divisors is an integer number (140390434144).

Almost surely, 2^280780868287 is an apocalyptic number.

280780868287 is a deficient number, since it is larger than the sum of its proper divisors (1).

280780868287 is an equidigital number, since it uses as much as digits as its factorization.

280780868287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38535168, while the sum is 64.

The spelling of 280780868287 in words is "two hundred eighty billion, seven hundred eighty million, eight hundred sixty-eight thousand, two hundred eighty-seven".