28635813811 has 8 divisors (see below), whose sum is σ = 31463812800. Its totient is φ = 25845272040.

The previous prime is 28635813749. The next prime is 28635813827. The reversal of 28635813811 is 11831853682.

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

It is a cyclic number.

It is not a de Polignac number, because 28635813811 - 2¹⁷ = 28635682739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28635813511) 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, 9362701 + ... + 9365758.

It is an arithmetic number, because the mean of its divisors is an integer number (3932976600).

Almost surely, 2^28635813811 is an apocalyptic number.

28635813811 is a deficient number, since it is larger than the sum of its proper divisors (2827998989).

28635813811 is a wasteful number, since it uses less digits than its factorization.

28635813811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18728609.

The product of its digits is 276480, while the sum is 46.

The spelling of 28635813811 in words is "twenty-eight billion, six hundred thirty-five million, eight hundred thirteen thousand, eight hundred eleven".