28111517441 has 16 divisors (see below), whose sum is σ = 34069486464. Its totient is φ = 22643407104.

The previous prime is 28111517387. The next prime is 28111517443. The reversal of 28111517441 is 14471511182.

It is not a de Polignac number, because 28111517441 - 2¹⁴ = 28111501057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28111517443) 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, 103175 + ... + 258588.

It is an arithmetic number, because the mean of its divisors is an integer number (2129342904).

Almost surely, 2^28111517441 is an apocalyptic number.

It is an amenable number.

28111517441 is a deficient number, since it is larger than the sum of its proper divisors (5957969023).

28111517441 is a wasteful number, since it uses less digits than its factorization.

28111517441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362440.

The product of its digits is 8960, while the sum is 35.

The spelling of 28111517441 in words is "twenty-eight billion, one hundred eleven million, five hundred seventeen thousand, four hundred forty-one".