28963173845 has 4 divisors (see below), whose sum is σ = 34755808620. Its totient is φ = 23170539072.

The previous prime is 28963173817. The next prime is 28963173901. The reversal of 28963173845 is 54837136982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16244522116 + 12718651729 = 127454^2 + 112777^2 .

It is a cyclic number.

It is not a de Polignac number, because 28963173845 - 2¹⁸ = 28962911701 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2896317380 + ... + 2896317389.

It is an arithmetic number, because the mean of its divisors is an integer number (8688952155).

Almost surely, 2^28963173845 is an apocalyptic number.

It is an amenable number.

28963173845 is a deficient number, since it is larger than the sum of its proper divisors (5792634775).

28963173845 is an equidigital number, since it uses as much as digits as its factorization.

28963173845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5792634774.

The product of its digits is 8709120, while the sum is 56.

The spelling of 28963173845 in words is "twenty-eight billion, nine hundred sixty-three million, one hundred seventy-three thousand, eight hundred forty-five".