28481050511 has 4 divisors (see below), whose sum is σ = 28565564352. Its totient is φ = 28396536672.

The previous prime is 28481050501. The next prime is 28481050567. The reversal of 28481050511 is 11505018482.

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 28481050511 - 2³⁴ = 11301181327 is a prime.

It is a super-2 number, since 2×28481050511² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28481050501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42256415 + ... + 42257088.

It is an arithmetic number, because the mean of its divisors is an integer number (7141391088).

Almost surely, 2^28481050511 is an apocalyptic number.

28481050511 is a deficient number, since it is larger than the sum of its proper divisors (84513841).

28481050511 is an equidigital number, since it uses as much as digits as its factorization.

28481050511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84513840.

The product of its (nonzero) digits is 12800, while the sum is 35.

Adding to 28481050511 its reverse (11505018482), we get a palindrome (39986068993).

The spelling of 28481050511 in words is "twenty-eight billion, four hundred eighty-one million, fifty thousand, five hundred eleven".