28550008505 has 16 divisors (see below), whose sum is σ = 36289036800. Its totient is φ = 21488339712.

The previous prime is 28550008457. The next prime is 28550008517. The reversal of 28550008505 is 50580005582.

It is a cyclic number.

It is not a de Polignac number, because 28550008505 - 2⁶ = 28550008441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167192 + ... + 291638.

It is an arithmetic number, because the mean of its divisors is an integer number (2268064800).

Almost surely, 2^28550008505 is an apocalyptic number.

It is an amenable number.

28550008505 is a deficient number, since it is larger than the sum of its proper divisors (7739028295).

28550008505 is a wasteful number, since it uses less digits than its factorization.

28550008505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127168.

The product of its (nonzero) digits is 80000, while the sum is 38.

The spelling of 28550008505 in words is "twenty-eight billion, five hundred fifty million, eight thousand, five hundred five".