278994853968 has 40 divisors (see below), whose sum is σ = 720880024416. Its totient is φ = 92979792000.

The previous prime is 278994853957. The next prime is 278994854027. The reversal of 278994853968 is 869358499872.

It is a junction number, because it is equal to n+sod(n) for n = 278994853893 and 278994853902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332923 + ... + 817818.

Almost surely, 2^278994853968 is an apocalyptic number.

It is an amenable number.

278994853968 is an abundant number, since it is smaller than the sum of its proper divisors (441885170448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

278994853968 is a wasteful number, since it uses less digits than its factorization.

278994853968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155803 (or 1155797 counting only the distinct ones).

The product of its digits is 1881169920, while the sum is 78.

The spelling of 278994853968 in words is "two hundred seventy-eight billion, nine hundred ninety-four million, eight hundred fifty-three thousand, nine hundred sixty-eight".