278055864241 has 2 divisors, whose sum is σ = 278055864242. Its totient is φ = 278055864240.

The previous prime is 278055864103. The next prime is 278055864271. The reversal of 278055864241 is 142468550872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235011648400 + 43044215841 = 484780^2 + 207471^2 .

It is a cyclic number.

It is not a de Polignac number, because 278055864241 - 2¹⁹ = 278055339953 is a prime.

It is not a weakly prime, because it can be changed into another prime (278055864271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139027932120 + 139027932121.

It is an arithmetic number, because the mean of its divisors is an integer number (139027932121).

Almost surely, 2^278055864241 is an apocalyptic number.

It is an amenable number.

278055864241 is a deficient number, since it is larger than the sum of its proper divisors (1).

278055864241 is an equidigital number, since it uses as much as digits as its factorization.

278055864241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4300800, while the sum is 52.

The spelling of 278055864241 in words is "two hundred seventy-eight billion, fifty-five million, eight hundred sixty-four thousand, two hundred forty-one".