28633686866665 has 8 divisors (see below), whose sum is σ = 34700626460808. Its totient is φ = 22680148012800.

The previous prime is 28633686866593. The next prime is 28633686866683. The reversal of 28633686866665 is 56666868633682.

It can be written as a sum of positive squares in 4 ways, for example, as 5030918906841 + 23602767959824 = 2242971^2 + 4858268^2 .

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

It is not a de Polignac number, because 28633686866665 - 2²⁵ = 28633653312233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28350184512 + ... + 28350185521.

It is an arithmetic number, because the mean of its divisors is an integer number (4337578307601).

Almost surely, 2^{28633686866665} is an apocalyptic number.

It is an amenable number.

28633686866665 is a deficient number, since it is larger than the sum of its proper divisors (6066939594143).

28633686866665 is a wasteful number, since it uses less digits than its factorization.

28633686866665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56700370139.

The product of its digits is 12899450880, while the sum is 79.

The spelling of 28633686866665 in words is "twenty-eight trillion, six hundred thirty-three billion, six hundred eighty-six million, eight hundred sixty-six thousand, six hundred sixty-five".