278747924872 has 16 divisors (see below), whose sum is σ = 522743961600. Its totient is φ = 139349535120.

The previous prime is 278747924761. The next prime is 278747924879. The reversal of 278747924872 is 278429747872.

It is a junction number, because it is equal to n+sod(n) for n = 278747924798 and 278747924807.

It is not an unprimeable number, because it can be changed into a prime (278747924879) 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, 3004872 + ... + 3096247.

It is an arithmetic number, because the mean of its divisors is an integer number (32671497600).

Almost surely, 2^278747924872 is an apocalyptic number.

It is an amenable number.

278747924872 is a deficient number, since it is larger than the sum of its proper divisors (243996036728).

278747924872 is a wasteful number, since it uses less digits than its factorization.

278747924872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6106836 (or 6106832 counting only the distinct ones).

The product of its digits is 177020928, while the sum is 67.

The spelling of 278747924872 in words is "two hundred seventy-eight billion, seven hundred forty-seven million, nine hundred twenty-four thousand, eight hundred seventy-two".