278710842811 has 4 divisors (see below), whose sum is σ = 278992085824. Its totient is φ = 278429599800.

The previous prime is 278710842799. The next prime is 278710842833. The reversal of 278710842811 is 118248017872.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 278710842811 - 2⁹ = 278710842299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (278710846811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140620020 + ... + 140622001.

It is an arithmetic number, because the mean of its divisors is an integer number (69748021456).

Almost surely, 2^278710842811 is an apocalyptic number.

278710842811 is a deficient number, since it is larger than the sum of its proper divisors (281243013).

278710842811 is an equidigital number, since it uses as much as digits as its factorization.

278710842811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281243012.

The product of its (nonzero) digits is 401408, while the sum is 49.

The spelling of 278710842811 in words is "two hundred seventy-eight billion, seven hundred ten million, eight hundred forty-two thousand, eight hundred eleven".