280005052505 has 8 divisors (see below), whose sum is σ = 337219082952. Its totient is φ = 223195362048.

The previous prime is 280005052493. The next prime is 280005052549. The reversal of 280005052505 is 505250500082.

It can be written as a sum of positive squares in 4 ways, for example, as 29017078336 + 250987974169 = 170344^2 + 500987^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 280005052505 - 2²² = 280000858201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101083472 + ... + 101086241.

It is an arithmetic number, because the mean of its divisors is an integer number (42152385369).

Almost surely, 2^280005052505 is an apocalyptic number.

It is an amenable number.

280005052505 is a deficient number, since it is larger than the sum of its proper divisors (57214030447).

280005052505 is a wasteful number, since it uses less digits than its factorization.

280005052505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202169995.

The product of its (nonzero) digits is 20000, while the sum is 32.

Adding to 280005052505 its reverse (505250500082), we get a palindrome (785255552587).

The spelling of 280005052505 in words is "two hundred eighty billion, five million, fifty-two thousand, five hundred five".