28551635636 has 12 divisors (see below), whose sum is σ = 51315777828. Its totient is φ = 13889984832.

The previous prime is 28551635621. The next prime is 28551635639. The reversal of 28551635636 is 63653615582.

It can be written as a sum of positive squares in 2 ways, for example, as 10500100900 + 18051534736 = 102470^2 + 134356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28551635639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96458081 + ... + 96458376.

It is an arithmetic number, because the mean of its divisors is an integer number (4276314819).

Almost surely, 2^28551635636 is an apocalyptic number.

It is an amenable number.

28551635636 is a deficient number, since it is larger than the sum of its proper divisors (22764142192).

28551635636 is a wasteful number, since it uses less digits than its factorization.

28551635636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192916498 (or 192916496 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 50.

The spelling of 28551635636 in words is "twenty-eight billion, five hundred fifty-one million, six hundred thirty-five thousand, six hundred thirty-six".