28064118825 has 18 divisors (see below), whose sum is σ = 50265955454. Its totient is φ = 14967529920.

The previous prime is 28064118811. The next prime is 28064118827. The reversal of 28064118825 is 52881146082.

It can be written as a sum of positive squares in 3 ways, for example, as 4449957264 + 23614161561 = 66708^2 + 153669^2 .

It is not a de Polignac number, because 28064118825 - 2⁷ = 28064118697 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28064118827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 62364484 + ... + 62364933.

Almost surely, 2^28064118825 is an apocalyptic number.

28064118825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28064118825 is a deficient number, since it is larger than the sum of its proper divisors (22201836629).

28064118825 is a wasteful number, since it uses less digits than its factorization.

28064118825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124729433 (or 124729425 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The spelling of 28064118825 in words is "twenty-eight billion, sixty-four million, one hundred eighteen thousand, eight hundred twenty-five".