278856248811 has 8 divisors (see below), whose sum is σ = 424923807744. Its totient is φ = 159346427880.

The previous prime is 278856248779. The next prime is 278856248873. The reversal of 278856248811 is 118842658872.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 278856248811 - 2⁵ = 278856248779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (278856247811) 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 in 7 ways as a sum of consecutive naturals, for example, 6639434475 + ... + 6639434516.

It is an arithmetic number, because the mean of its divisors is an integer number (53115475968).

Almost surely, 2^278856248811 is an apocalyptic number.

278856248811 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

278856248811 is a deficient number, since it is larger than the sum of its proper divisors (146067558933).

278856248811 is a wasteful number, since it uses less digits than its factorization.

278856248811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13278869001.

The product of its digits is 13762560, while the sum is 60.

The spelling of 278856248811 in words is "two hundred seventy-eight billion, eight hundred fifty-six million, two hundred forty-eight thousand, eight hundred eleven".