28877145559 has 4 divisors (see below), whose sum is σ = 29421997416. Its totient is φ = 28332293704.

The previous prime is 28877145533. The next prime is 28877145581. The reversal of 28877145559 is 95554177882.

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 28877145559 - 2¹⁹ = 28876621271 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28877145497 and 28877145506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28877145599) 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, 272425849 + ... + 272425954.

It is an arithmetic number, because the mean of its divisors is an integer number (7355499354).

Almost surely, 2^28877145559 is an apocalyptic number.

28877145559 is a deficient number, since it is larger than the sum of its proper divisors (544851857).

28877145559 is an equidigital number, since it uses as much as digits as its factorization.

28877145559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544851856.

The product of its digits is 28224000, while the sum is 61.

The spelling of 28877145559 in words is "twenty-eight billion, eight hundred seventy-seven million, one hundred forty-five thousand, five hundred fifty-nine".