280664573009 has 2 divisors, whose sum is σ = 280664573010. Its totient is φ = 280664573008.

The previous prime is 280664572961. The next prime is 280664573011. The reversal of 280664573009 is 900375466082.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185957587984 + 94706985025 = 431228^2 + 307745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280664573009 is a prime.

Together with 280664573011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (280664573089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140332286504 + 140332286505.

It is an arithmetic number, because the mean of its divisors is an integer number (140332286505).

Almost surely, 2^280664573009 is an apocalyptic number.

It is an amenable number.

280664573009 is a deficient number, since it is larger than the sum of its proper divisors (1).

280664573009 is an equidigital number, since it uses as much as digits as its factorization.

280664573009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 280664573009 in words is "two hundred eighty billion, six hundred sixty-four million, five hundred seventy-three thousand, nine".