278711813343 has 4 divisors (see below), whose sum is σ = 371615751128. Its totient is φ = 185807875560.

The previous prime is 278711813339. The next prime is 278711813353. The reversal of 278711813343 is 343318117872.

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

It is not a de Polignac number, because 278711813343 - 2² = 278711813339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 278711813292 and 278711813301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278711813353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46451968888 + ... + 46451968893.

It is an arithmetic number, because the mean of its divisors is an integer number (92903937782).

Almost surely, 2^278711813343 is an apocalyptic number.

278711813343 is a deficient number, since it is larger than the sum of its proper divisors (92903937785).

278711813343 is an equidigital number, since it uses as much as digits as its factorization.

278711813343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92903937784.

The product of its digits is 677376, while the sum is 48.

The spelling of 278711813343 in words is "two hundred seventy-eight billion, seven hundred eleven million, eight hundred thirteen thousand, three hundred forty-three".