280505250003 has 16 divisors (see below), whose sum is σ = 412047320832. Its totient is φ = 168319980000.

The previous prime is 280505249987. The next prime is 280505250013. The reversal of 280505250003 is 300052505082.

It is not a de Polignac number, because 280505250003 - 2⁴ = 280505249987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (280505250013) 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 15 ways as a sum of consecutive naturals, for example, 42076663 + ... + 42083328.

It is an arithmetic number, because the mean of its divisors is an integer number (25752957552).

Almost surely, 2^280505250003 is an apocalyptic number.

280505250003 is a deficient number, since it is larger than the sum of its proper divisors (131542070829).

280505250003 is a wasteful number, since it uses less digits than its factorization.

280505250003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84160106.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 280505250003 its reverse (300052505082), we get a palindrome (580557755085).

The spelling of 280505250003 in words is "two hundred eighty billion, five hundred five million, two hundred fifty thousand, three".