278493064017611 has 2 divisors, whose sum is σ = 278493064017612. Its totient is φ = 278493064017610.

The previous prime is 278493064017559. The next prime is 278493064017613. The reversal of 278493064017611 is 116710460394872.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-278493064017611 is a prime.

Together with 278493064017613, 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 (278493064017613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139246532008805 + 139246532008806.

It is an arithmetic number, because the mean of its divisors is an integer number (139246532008806).

Almost surely, 2^{278493064017611} is an apocalyptic number.

278493064017611 is a deficient number, since it is larger than the sum of its proper divisors (1).

278493064017611 is an equidigital number, since it uses as much as digits as its factorization.

278493064017611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12192768, while the sum is 59.

The spelling of 278493064017611 in words is "two hundred seventy-eight trillion, four hundred ninety-three billion, sixty-four million, seventeen thousand, six hundred eleven".