278377767313 has 2 divisors, whose sum is σ = 278377767314. Its totient is φ = 278377767312.

The previous prime is 278377767257. The next prime is 278377767373. The reversal of 278377767313 is 313767773872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163452021264 + 114925746049 = 404292^2 + 339007^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-278377767313 is a prime.

It is not a weakly prime, because it can be changed into another prime (278377767373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139188883656 + 139188883657.

It is an arithmetic number, because the mean of its divisors is an integer number (139188883657).

Almost surely, 2^278377767313 is an apocalyptic number.

It is an amenable number.

278377767313 is a deficient number, since it is larger than the sum of its proper divisors (1).

278377767313 is an equidigital number, since it uses as much as digits as its factorization.

278377767313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43563744, while the sum is 61.

The spelling of 278377767313 in words is "two hundred seventy-eight billion, three hundred seventy-seven million, seven hundred sixty-seven thousand, three hundred thirteen".