28524842581 has 16 divisors (see below), whose sum is σ = 30341516544. Its totient is φ = 26756713984.

The previous prime is 28524842551. The next prime is 28524842597. The reversal of 28524842581 is 18524842582.

It is a cyclic number.

It is not a de Polignac number, because 28524842581 - 2²¹ = 28522745429 is a prime.

It is a super-2 number, since 2×28524842581² (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 (28524842551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3234480 + ... + 3243286.

It is an arithmetic number, because the mean of its divisors is an integer number (1896344784).

Almost surely, 2^28524842581 is an apocalyptic number.

It is an amenable number.

28524842581 is a deficient number, since it is larger than the sum of its proper divisors (1816673963).

28524842581 is a wasteful number, since it uses less digits than its factorization.

28524842581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11540.

The product of its digits is 1638400, while the sum is 49.

Subtracting from 28524842581 its reverse (18524842582), we obtain a palindrome (9999999999).

The spelling of 28524842581 in words is "twenty-eight billion, five hundred twenty-four million, eight hundred forty-two thousand, five hundred eighty-one".