28055867577 has 4 divisors (see below), whose sum is σ = 37407823440. Its totient is φ = 18703911716.

The previous prime is 28055867549. The next prime is 28055867599. The reversal of 28055867577 is 77576855082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28055867577 - 2²⁶ = 27988758713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28055867577.

It is not an unprimeable number, because it can be changed into a prime (28055867377) by changing a digit.

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, 4675977927 + ... + 4675977932.

It is an arithmetic number, because the mean of its divisors is an integer number (9351955860).

Almost surely, 2^28055867577 is an apocalyptic number.

It is an amenable number.

28055867577 is a deficient number, since it is larger than the sum of its proper divisors (9351955863).

28055867577 is an equidigital number, since it uses as much as digits as its factorization.

28055867577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9351955862.

The product of its (nonzero) digits is 32928000, while the sum is 60.

The spelling of 28055867577 in words is "twenty-eight billion, fifty-five million, eight hundred sixty-seven thousand, five hundred seventy-seven".