280807042897 has 4 divisors (see below), whose sum is σ = 280907729460. Its totient is φ = 280706356336.

The previous prime is 280807042877. The next prime is 280807042907. The reversal of 280807042897 is 798240708082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65551872961 + 215255169936 = 256031^2 + 463956^2 .

It is a cyclic number.

It is not a de Polignac number, because 280807042897 - 2¹¹ = 280807040849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280807042877) 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 3 ways as a sum of consecutive naturals, for example, 50339098 + ... + 50344675.

It is an arithmetic number, because the mean of its divisors is an integer number (70226932365).

Almost surely, 2^280807042897 is an apocalyptic number.

It is an amenable number.

280807042897 is a deficient number, since it is larger than the sum of its proper divisors (100686563).

280807042897 is a wasteful number, since it uses less digits than its factorization.

280807042897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100686562.

The product of its (nonzero) digits is 3612672, while the sum is 55.

The spelling of 280807042897 in words is "two hundred eighty billion, eight hundred seven million, forty-two thousand, eight hundred ninety-seven".