278720725279 has 2 divisors, whose sum is σ = 278720725280. Its totient is φ = 278720725278.

The previous prime is 278720725219. The next prime is 278720725289. The reversal of 278720725279 is 972527027872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 278720725279 - 2¹⁹ = 278720200991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278720725219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139360362639 + 139360362640.

It is an arithmetic number, because the mean of its divisors is an integer number (139360362640).

Almost surely, 2^278720725279 is an apocalyptic number.

278720725279 is a deficient number, since it is larger than the sum of its proper divisors (1).

278720725279 is an equidigital number, since it uses as much as digits as its factorization.

278720725279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13829760, while the sum is 58.

The spelling of 278720725279 in words is "two hundred seventy-eight billion, seven hundred twenty million, seven hundred twenty-five thousand, two hundred seventy-nine".