280027778005 has 16 divisors (see below), whose sum is σ = 344422134000. Its totient is φ = 218435811840.

The previous prime is 280027778003. The next prime is 280027778027. The reversal of 280027778005 is 500877720082.

It can be written as a sum of positive squares in 8 ways, for example, as 633075921 + 279394702084 = 25161^2 + 528578^2 .

It is not a de Polignac number, because 280027778005 - 2¹ = 280027778003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280027778003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15030 + ... + 748519.

It is an arithmetic number, because the mean of its divisors is an integer number (21526383375).

Almost surely, 2^280027778005 is an apocalyptic number.

It is an amenable number.

280027778005 is a deficient number, since it is larger than the sum of its proper divisors (64394355995).

280027778005 is a wasteful number, since it uses less digits than its factorization.

280027778005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765384.

The product of its (nonzero) digits is 439040, while the sum is 46.

The spelling of 280027778005 in words is "two hundred eighty billion, twenty-seven million, seven hundred seventy-eight thousand, five".