28545113017 has 4 divisors (see below), whose sum is σ = 29316602596. Its totient is φ = 27773623440.

The previous prime is 28545112979. The next prime is 28545113041. The reversal of 28545113017 is 71031154582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27147175696 + 1397937321 = 164764^2 + 37389^2 .

It is a cyclic number.

It is not a de Polignac number, because 28545113017 - 2⁷ = 28545112889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 771489541 = 28545113017 / (2 + 8 + 5 + 4 + 5 + 1 + 1 + 3 + 0 + 1 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28545113417) 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, 385744734 + ... + 385744807.

It is an arithmetic number, because the mean of its divisors is an integer number (7329150649).

Almost surely, 2^28545113017 is an apocalyptic number.

It is an amenable number.

28545113017 is a deficient number, since it is larger than the sum of its proper divisors (771489579).

28545113017 is an equidigital number, since it uses as much as digits as its factorization.

28545113017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771489578.

The product of its (nonzero) digits is 33600, while the sum is 37.

Adding to 28545113017 its reverse (71031154582), we get a palindrome (99576267599).

The spelling of 28545113017 in words is "twenty-eight billion, five hundred forty-five million, one hundred thirteen thousand, seventeen".