278325298668 has 48 divisors (see below), whose sum is σ = 671867239680. Its totient is φ = 89569617984.

The previous prime is 278325298661. The next prime is 278325298673. The reversal of 278325298668 is 866892523872.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 278325298599 and 278325298608.

It is not an unprimeable number, because it can be changed into a prime (278325298661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9425455 + ... + 9454937.

It is an arithmetic number, because the mean of its divisors is an integer number (13997234160).

Almost surely, 2^278325298668 is an apocalyptic number.

It is an amenable number.

278325298668 is an abundant number, since it is smaller than the sum of its proper divisors (393541941012).

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

278325298668 is a wasteful number, since it uses less digits than its factorization.

278325298668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56646 (or 56644 counting only the distinct ones).

The product of its digits is 139345920, while the sum is 66.

The spelling of 278325298668 in words is "two hundred seventy-eight billion, three hundred twenty-five million, two hundred ninety-eight thousand, six hundred sixty-eight".