280055305278 has 64 divisors (see below), whose sum is σ = 711333342720. Its totient is φ = 80006602176.

The previous prime is 280055305273. The next prime is 280055305307. The reversal of 280055305278 is 872503550082.

280055305278 is a `hidden beast` number, since 28 + 0 + 0 + 55 + 305 + 278 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280055305273) 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 31 ways as a sum of consecutive naturals, for example, 3679201 + ... + 3754547.

It is an arithmetic number, because the mean of its divisors is an integer number (11114583480).

Almost surely, 2^280055305278 is an apocalyptic number.

280055305278 is an abundant number, since it is smaller than the sum of its proper divisors (431278037442).

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

280055305278 is a wasteful number, since it uses less digits than its factorization.

280055305278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85198 (or 85192 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The spelling of 280055305278 in words is "two hundred eighty billion, fifty-five million, three hundred five thousand, two hundred seventy-eight".