1028085550559 has 4 divisors (see below), whose sum is σ = 1028229809904. Its totient is φ = 1027941291216.

The previous prime is 1028085550543. The next prime is 1028085550579. The reversal of 1028085550559 is 9550555808201.

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

It is a cyclic number.

It is not a de Polignac number, because 1028085550559 - 2⁴ = 1028085550543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1028085550559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028085550519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72118982 + ... + 72133235.

It is an arithmetic number, because the mean of its divisors is an integer number (257057452476).

Almost surely, 2^{1028085550559} is an apocalyptic number.

1028085550559 is a deficient number, since it is larger than the sum of its proper divisors (144259345).

1028085550559 is an equidigital number, since it uses as much as digits as its factorization.

1028085550559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144259344.

The product of its (nonzero) digits is 3600000, while the sum is 53.

The spelling of 1028085550559 in words is "one trillion, twenty-eight billion, eighty-five million, five hundred fifty thousand, five hundred fifty-nine".