278283456868 has 12 divisors (see below), whose sum is σ = 493855149312. Its totient is φ = 137181985640.

The previous prime is 278283456817. The next prime is 278283456881. The reversal of 278283456868 is 868654382872.

It is an unprimeable number.

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, 489935380 + ... + 489935947.

It is an arithmetic number, because the mean of its divisors is an integer number (41154595776).

Almost surely, 2^278283456868 is an apocalyptic number.

It is an amenable number.

278283456868 is a deficient number, since it is larger than the sum of its proper divisors (215571692444).

278283456868 is a wasteful number, since it uses less digits than its factorization.

278283456868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979871402 (or 979871400 counting only the distinct ones).

The product of its digits is 247726080, while the sum is 67.

The spelling of 278283456868 in words is "two hundred seventy-eight billion, two hundred eighty-three million, four hundred fifty-six thousand, eight hundred sixty-eight".