278450228279 has 2 divisors, whose sum is σ = 278450228280. Its totient is φ = 278450228278.

The previous prime is 278450228257. The next prime is 278450228323. The reversal of 278450228279 is 972822054872.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-278450228279 is a prime.

It is a super-2 number, since 2×278450228279² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278450228219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139225114139 + 139225114140.

It is an arithmetic number, because the mean of its divisors is an integer number (139225114140).

Almost surely, 2^278450228279 is an apocalyptic number.

278450228279 is a deficient number, since it is larger than the sum of its proper divisors (1).

278450228279 is an equidigital number, since it uses as much as digits as its factorization.

278450228279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 278450228279 in words is "two hundred seventy-eight billion, four hundred fifty million, two hundred twenty-eight thousand, two hundred seventy-nine".