28055837065 has 8 divisors (see below), whose sum is σ = 34000341768. Its totient is φ = 22222444800.

The previous prime is 28055837063. The next prime is 28055837077. The reversal of 28055837065 is 56073855082.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18064435216 + 9991401849 = 134404^2 + 99957^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28055837065 - 2¹ = 28055837063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28055837063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27777552 + ... + 27778561.

It is an arithmetic number, because the mean of its divisors is an integer number (4250042721).

Almost surely, 2^28055837065 is an apocalyptic number.

It is an amenable number.

28055837065 is a deficient number, since it is larger than the sum of its proper divisors (5944504703).

28055837065 is a wasteful number, since it uses less digits than its factorization.

28055837065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55556219.

The product of its (nonzero) digits is 2016000, while the sum is 49.

The spelling of 28055837065 in words is "twenty-eight billion, fifty-five million, eight hundred thirty-seven thousand, sixty-five".