478804666289 has 2 divisors, whose sum is σ = 478804666290. Its totient is φ = 478804666288.

The previous prime is 478804666213. The next prime is 478804666331. The reversal of 478804666289 is 982666408874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 475571606689 + 3233059600 = 689617^2 + 56860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478804666289 is a prime.

It is not a weakly prime, because it can be changed into another prime (478804666789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239402333144 + 239402333145.

It is an arithmetic number, because the mean of its divisors is an integer number (239402333145).

Almost surely, 2^478804666289 is an apocalyptic number.

It is an amenable number.

478804666289 is a deficient number, since it is larger than the sum of its proper divisors (1).

478804666289 is an equidigital number, since it uses as much as digits as its factorization.

478804666289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222953472, while the sum is 68.

The spelling of 478804666289 in words is "four hundred seventy-eight billion, eight hundred four million, six hundred sixty-six thousand, two hundred eighty-nine".