278480405017 has 2 divisors, whose sum is σ = 278480405018. Its totient is φ = 278480405016.

The previous prime is 278480405003. The next prime is 278480405039. The reversal of 278480405017 is 710504084872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171776262681 + 106704142336 = 414459^2 + 326656^2 .

It is a cyclic number.

It is not a de Polignac number, because 278480405017 - 2⁷ = 278480404889 is a prime.

It is not a weakly prime, because it can be changed into another prime (278480475017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139240202508 + 139240202509.

It is an arithmetic number, because the mean of its divisors is an integer number (139240202509).

Almost surely, 2^278480405017 is an apocalyptic number.

It is an amenable number.

278480405017 is a deficient number, since it is larger than the sum of its proper divisors (1).

278480405017 is an equidigital number, since it uses as much as digits as its factorization.

278480405017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 501760, while the sum is 46.

Adding to 278480405017 its reverse (710504084872), we get a palindrome (988984489889).

The spelling of 278480405017 in words is "two hundred seventy-eight billion, four hundred eighty million, four hundred five thousand, seventeen".