28153846645 has 12 divisors (see below), whose sum is σ = 33866121060. Its totient is φ = 22468871040.

The previous prime is 28153846607. The next prime is 28153846661. The reversal of 28153846645 is 54664835182.

It can be written as a sum of positive squares in 6 ways, for example, as 17577986724 + 10575859921 = 132582^2 + 102839^2 .

It is not a de Polignac number, because 28153846645 - 2²³ = 28145458037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28153846592 and 28153846601.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 870321 + ... + 902089.

It is an arithmetic number, because the mean of its divisors is an integer number (2822176755).

Almost surely, 2^28153846645 is an apocalyptic number.

It is an amenable number.

28153846645 is a deficient number, since it is larger than the sum of its proper divisors (5712274415).

28153846645 is an frugal number, since it uses more digits than its factorization.

28153846645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32616 (or 32195 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 52.

The spelling of 28153846645 in words is "twenty-eight billion, one hundred fifty-three million, eight hundred forty-six thousand, six hundred forty-five".