278579365013 has 2 divisors, whose sum is σ = 278579365014. Its totient is φ = 278579365012.

The previous prime is 278579365003. The next prime is 278579365039. The reversal of 278579365013 is 310563975872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 276027296689 + 2552068324 = 525383^2 + 50518^2 .

It is a cyclic number.

It is not a de Polignac number, because 278579365013 - 2⁴ = 278579364997 is a prime.

It is a super-2 number, since 2×278579365013² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 278579365013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (278579365003) 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, 139289682506 + 139289682507.

It is an arithmetic number, because the mean of its divisors is an integer number (139289682507).

Almost surely, 2^278579365013 is an apocalyptic number.

It is an amenable number.

278579365013 is a deficient number, since it is larger than the sum of its proper divisors (1).

278579365013 is an equidigital number, since it uses as much as digits as its factorization.

278579365013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9525600, while the sum is 56.

The spelling of 278579365013 in words is "two hundred seventy-eight billion, five hundred seventy-nine million, three hundred sixty-five thousand, thirteen".