280513104109 has 4 divisors (see below), whose sum is σ = 320586404704. Its totient is φ = 240439803516.

The previous prime is 280513104089. The next prime is 280513104133. The reversal of 280513104109 is 901401315082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 280513104109 - 2¹¹ = 280513102061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280513104409) 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, 20036650287 + ... + 20036650300.

It is an arithmetic number, because the mean of its divisors is an integer number (80146601176).

Almost surely, 2^280513104109 is an apocalyptic number.

It is an amenable number.

280513104109 is a deficient number, since it is larger than the sum of its proper divisors (40073300595).

280513104109 is an equidigital number, since it uses as much as digits as its factorization.

280513104109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40073300594.

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 280513104109 in words is "two hundred eighty billion, five hundred thirteen million, one hundred four thousand, one hundred nine".