278360854867 has 2 divisors, whose sum is σ = 278360854868. Its totient is φ = 278360854866.

The previous prime is 278360854831. The next prime is 278360854897. The reversal of 278360854867 is 768458063872.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-278360854867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 278360854799 and 278360854808.

It is not a weakly prime, because it can be changed into another prime (278360854817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139180427433 + 139180427434.

It is an arithmetic number, because the mean of its divisors is an integer number (139180427434).

Almost surely, 2^278360854867 is an apocalyptic number.

278360854867 is a deficient number, since it is larger than the sum of its proper divisors (1).

278360854867 is an equidigital number, since it uses as much as digits as its factorization.

278360854867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108380160, while the sum is 64.

The spelling of 278360854867 in words is "two hundred seventy-eight billion, three hundred sixty million, eight hundred fifty-four thousand, eight hundred sixty-seven".