280725312889 has 16 divisors (see below), whose sum is σ = 321838358400. Its totient is φ = 239865663744.

The previous prime is 280725312871. The next prime is 280725312899. The reversal of 280725312889 is 988213527082.

It is not a de Polignac number, because 280725312889 - 2⁷ = 280725312761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280725312869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3255867 + ... + 3340975.

It is an arithmetic number, because the mean of its divisors is an integer number (20114897400).

Almost surely, 2^280725312889 is an apocalyptic number.

It is an amenable number.

280725312889 is a deficient number, since it is larger than the sum of its proper divisors (41113045511).

280725312889 is a wasteful number, since it uses less digits than its factorization.

280725312889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86592.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 280725312889 in words is "two hundred eighty billion, seven hundred twenty-five million, three hundred twelve thousand, eight hundred eighty-nine".