278477774872 has 32 divisors (see below), whose sum is σ = 569660144400. Its totient is φ = 126570470400.

The previous prime is 278477774857. The next prime is 278477774879.

278477774872 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278477774879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1011472 + ... + 1256992.

Almost surely, 2^278477774872 is an apocalyptic number.

278477774872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

278477774872 is an abundant number, since it is smaller than the sum of its proper divisors (291182369528).

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

278477774872 is a wasteful number, since it uses less digits than its factorization.

278477774872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258427 (or 258423 counting only the distinct ones).

The product of its digits is 481890304, while the sum is 70.

The spelling of 278477774872 in words is "two hundred seventy-eight billion, four hundred seventy-seven million, seven hundred seventy-four thousand, eight hundred seventy-two".