27880528811 has 4 divisors (see below), whose sum is σ = 27934042824. Its totient is φ = 27827014800.

The previous prime is 27880528799. The next prime is 27880528817. The reversal of 27880528811 is 11882508872.

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 27880528811 - 2³⁰ = 26806786987 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 27880528811.

It is not an unprimeable number, because it can be changed into a prime (27880528817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26756225 + ... + 26757266.

It is an arithmetic number, because the mean of its divisors is an integer number (6983510706).

Almost surely, 2^27880528811 is an apocalyptic number.

27880528811 is a deficient number, since it is larger than the sum of its proper divisors (53514013).

27880528811 is an equidigital number, since it uses as much as digits as its factorization.

27880528811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53514012.

The product of its (nonzero) digits is 573440, while the sum is 50.

The spelling of 27880528811 in words is "twenty-seven billion, eight hundred eighty million, five hundred twenty-eight thousand, eight hundred eleven".