278825051677349 has 2 divisors, whose sum is σ = 278825051677350. Its totient is φ = 278825051677348.

The previous prime is 278825051677303. The next prime is 278825051677369. The reversal of 278825051677349 is 943776150528872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275610399904324 + 3214651773025 = 16601518^2 + 1792945^2 .

It is a cyclic number.

It is not a de Polignac number, because 278825051677349 - 2²⁴ = 278825034900133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278825051677369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139412525838674 + 139412525838675.

It is an arithmetic number, because the mean of its divisors is an integer number (139412525838675).

It is a 1-persistent number, because it is pandigital, but 2⋅278825051677349 = 557650103354698 is not.

Almost surely, 2^{278825051677349} is an apocalyptic number.

It is an amenable number.

278825051677349 is a deficient number, since it is larger than the sum of its proper divisors (1).

278825051677349 is an equidigital number, since it uses as much as digits as its factorization.

278825051677349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1422489600, while the sum is 74.

The spelling of 278825051677349 in words is "two hundred seventy-eight trillion, eight hundred twenty-five billion, fifty-one million, six hundred seventy-seven thousand, three hundred forty-nine".