280530055505 has 16 divisors (see below), whose sum is σ = 401454192384. Its totient is φ = 183999837120.

The previous prime is 280530055501. The next prime is 280530055511. The reversal of 280530055505 is 505550035082.

It is not a de Polignac number, because 280530055505 - 2² = 280530055501 is a prime.

It is a super-2 number, since 2×280530055505² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (280530055501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174241466 + ... + 174243075.

It is an arithmetic number, because the mean of its divisors is an integer number (25090887024).

Almost surely, 2^280530055505 is an apocalyptic number.

It is an amenable number.

280530055505 is a deficient number, since it is larger than the sum of its proper divisors (120924136879).

280530055505 is a wasteful number, since it uses less digits than its factorization.

280530055505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348484576.

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 280530055505 in words is "two hundred eighty billion, five hundred thirty million, fifty-five thousand, five hundred five".