278355000071 has 2 divisors, whose sum is σ = 278355000072. Its totient is φ = 278355000070.

The previous prime is 278354999963. The next prime is 278355000083. The reversal of 278355000071 is 170000553872.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-278355000071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 278354999989 and 278355000034.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278355000871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139177500035 + 139177500036.

It is an arithmetic number, because the mean of its divisors is an integer number (139177500036).

Almost surely, 2^278355000071 is an apocalyptic number.

278355000071 is a deficient number, since it is larger than the sum of its proper divisors (1).

278355000071 is an equidigital number, since it uses as much as digits as its factorization.

278355000071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 38.

The spelling of 278355000071 in words is "two hundred seventy-eight billion, three hundred fifty-five million, seventy-one", and thus it is an aban number.