1028805559571 has 4 divisors (see below), whose sum is σ = 1045671224544. Its totient is φ = 1011939894600.

The previous prime is 1028805559549. The next prime is 1028805559583. The reversal of 1028805559571 is 1759555088201.

1028805559571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-1028805559571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028805559511) 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, 8432832395 + ... + 8432832516.

It is an arithmetic number, because the mean of its divisors is an integer number (261417806136).

Almost surely, 2^{1028805559571} is an apocalyptic number.

1028805559571 is a deficient number, since it is larger than the sum of its proper divisors (16865664973).

1028805559571 is an equidigital number, since it uses as much as digits as its factorization.

1028805559571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16865664972.

The product of its (nonzero) digits is 5040000, while the sum is 56.

The spelling of 1028805559571 in words is "one trillion, twenty-eight billion, eight hundred five million, five hundred fifty-nine thousand, five hundred seventy-one".