550128101585 has 4 divisors (see below), whose sum is σ = 660153721908. Its totient is φ = 440102481264.

The previous prime is 550128101563. The next prime is 550128101603. The reversal of 550128101585 is 585101821055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 255271499536 + 294856602049 = 505244^2 + 543007^2 .

It is a cyclic number.

It is not a de Polignac number, because 550128101585 - 2²⁰ = 550127053009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55012810154 + ... + 55012810163.

It is an arithmetic number, because the mean of its divisors is an integer number (165038430477).

Almost surely, 2^550128101585 is an apocalyptic number.

It is an amenable number.

550128101585 is a deficient number, since it is larger than the sum of its proper divisors (110025620323).

550128101585 is a wasteful number, since it uses less digits than its factorization.

550128101585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110025620322.

The product of its (nonzero) digits is 80000, while the sum is 41.

The spelling of 550128101585 in words is "five hundred fifty billion, one hundred twenty-eight million, one hundred one thousand, five hundred eighty-five".