278855265041 has 2 divisors, whose sum is σ = 278855265042. Its totient is φ = 278855265040.

The previous prime is 278855265023. The next prime is 278855265107. The reversal of 278855265041 is 140562558872.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 270534176641 + 8321088400 = 520129^2 + 91220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-278855265041 is a prime.

It is not a weakly prime, because it can be changed into another prime (278855265541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139427632520 + 139427632521.

It is an arithmetic number, because the mean of its divisors is an integer number (139427632521).

Almost surely, 2^278855265041 is an apocalyptic number.

It is an amenable number.

278855265041 is a deficient number, since it is larger than the sum of its proper divisors (1).

278855265041 is an equidigital number, since it uses as much as digits as its factorization.

278855265041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376000, while the sum is 53.

The spelling of 278855265041 in words is "two hundred seventy-eight billion, eight hundred fifty-five million, two hundred sixty-five thousand, forty-one".