278056676618713 has 2 divisors, whose sum is σ = 278056676618714. Its totient is φ = 278056676618712.

The previous prime is 278056676618597. The next prime is 278056676618731. The reversal of 278056676618713 is 317816676650872.

Together with next prime (278056676618731) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 273374875538704 + 4681801080009 = 16534052^2 + 2163747^2 .

It is a cyclic number.

It is not a de Polignac number, because 278056676618713 - 2³⁷ = 277919237665241 is a prime.

It is not a weakly prime, because it can be changed into another prime (278056676613713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139028338309356 + 139028338309357.

It is an arithmetic number, because the mean of its divisors is an integer number (139028338309357).

Almost surely, 2^{278056676618713} is an apocalyptic number.

It is an amenable number.

278056676618713 is a deficient number, since it is larger than the sum of its proper divisors (1).

278056676618713 is an equidigital number, since it uses as much as digits as its factorization.

278056676618713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 853493760, while the sum is 73.

The spelling of 278056676618713 in words is "two hundred seventy-eight trillion, fifty-six billion, six hundred seventy-six million, six hundred eighteen thousand, seven hundred thirteen".