28542561559 has 4 divisors (see below), whose sum is σ = 28568676616. Its totient is φ = 28516446504.

The previous prime is 28542561493. The next prime is 28542561563. The reversal of 28542561559 is 95516524582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95516524582 = 2 ⋅47758262291.

It is a cyclic number.

It is not a de Polignac number, because 28542561559 - 2¹¹ = 28542559511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28542561589) 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, 13055889 + ... + 13058074.

It is an arithmetic number, because the mean of its divisors is an integer number (7142169154).

Almost surely, 2^28542561559 is an apocalyptic number.

28542561559 is a deficient number, since it is larger than the sum of its proper divisors (26115057).

28542561559 is a wasteful number, since it uses less digits than its factorization.

28542561559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26115056.

The product of its digits is 4320000, while the sum is 52.

The spelling of 28542561559 in words is "twenty-eight billion, five hundred forty-two million, five hundred sixty-one thousand, five hundred fifty-nine".