278855265107 has 2 divisors, whose sum is σ = 278855265108. Its totient is φ = 278855265106.

The previous prime is 278855265041. The next prime is 278855265121. The reversal of 278855265107 is 701562558872.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-278855265107 is a prime.

It is not a weakly prime, because it can be changed into another prime (278855265127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139427632553 + 139427632554.

It is an arithmetic number, because the mean of its divisors is an integer number (139427632554).

Almost surely, 2^278855265107 is an apocalyptic number.

278855265107 is a deficient number, since it is larger than the sum of its proper divisors (1).

278855265107 is an equidigital number, since it uses as much as digits as its factorization.

278855265107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408000, while the sum is 56.

The spelling of 278855265107 in words is "two hundred seventy-eight billion, eight hundred fifty-five million, two hundred sixty-five thousand, one hundred seven".