278803870863 has 16 divisors (see below), whose sum is σ = 424858874880. Its totient is φ = 159310917216.

The previous prime is 278803870853. The next prime is 278803870889. The reversal of 278803870863 is 368078308872.

It is not a de Polignac number, because 278803870863 - 2⁵ = 278803870831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 278803870797 and 278803870806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278803870853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424458 + ... + 858936.

It is an arithmetic number, because the mean of its divisors is an integer number (26553679680).

Almost surely, 2^278803870863 is an apocalyptic number.

278803870863 is a deficient number, since it is larger than the sum of its proper divisors (146055004017).

278803870863 is a wasteful number, since it uses less digits than its factorization.

278803870863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465046.

The product of its (nonzero) digits is 21676032, while the sum is 60.

The spelling of 278803870863 in words is "two hundred seventy-eight billion, eight hundred three million, eight hundred seventy thousand, eight hundred sixty-three".