28080220708811 has 4 divisors (see below), whose sum is σ = 28733249097432. Its totient is φ = 27427192320192.

The previous prime is 28080220708753. The next prime is 28080220708829. The reversal of 28080220708811 is 11880702208082.

It is a happy number.

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 28080220708811 - 2³⁸ = 27805342801867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28080220705811) 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, 326514194246 + ... + 326514194331.

It is an arithmetic number, because the mean of its divisors is an integer number (7183312274358).

Almost surely, 2^{28080220708811} is an apocalyptic number.

28080220708811 is a deficient number, since it is larger than the sum of its proper divisors (653028388621).

28080220708811 is an equidigital number, since it uses as much as digits as its factorization.

28080220708811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653028388620.

The product of its (nonzero) digits is 229376, while the sum is 47.

The spelling of 28080220708811 in words is "twenty-eight trillion, eighty billion, two hundred twenty million, seven hundred eight thousand, eight hundred eleven".