278401816876 has 12 divisors (see below), whose sum is σ = 512845452280. Its totient is φ = 131874544800.

The previous prime is 278401816867. The next prime is 278401816981. The reversal of 278401816876 is 678618104872.

It is a self number, because there is not a number n which added to its sum of digits gives 278401816876.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1831590825 + ... + 1831590976.

Almost surely, 2^278401816876 is an apocalyptic number.

It is an amenable number.

278401816876 is a deficient number, since it is larger than the sum of its proper divisors (234443635404).

278401816876 is a wasteful number, since it uses less digits than its factorization.

278401816876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663181824 (or 3663181822 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 58.

The spelling of 278401816876 in words is "two hundred seventy-eight billion, four hundred one million, eight hundred sixteen thousand, eight hundred seventy-six".