280055052778 has 32 divisors (see below), whose sum is σ = 451238150160. Its totient is φ = 129883852800.

The previous prime is 280055052757. The next prime is 280055052803. The reversal of 280055052778 is 877250550082.

It can be written as a sum of positive squares in 8 ways, for example, as 99933751129 + 180121301649 = 316123^2 + 424407^2 .

It is an unprimeable number.

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, 3185718 + ... + 3272446.

Almost surely, 2^280055052778 is an apocalyptic number.

280055052778 is a deficient number, since it is larger than the sum of its proper divisors (171183097382).

280055052778 is a wasteful number, since it uses less digits than its factorization.

280055052778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88122.

The product of its (nonzero) digits is 1568000, while the sum is 49.

The spelling of 280055052778 in words is "two hundred eighty billion, fifty-five million, fifty-two thousand, seven hundred seventy-eight".