28173254503 has 4 divisors (see below), whose sum is σ = 28173991888. Its totient is φ = 28172517120.

The previous prime is 28173254477. The next prime is 28173254533. The reversal of 28173254503 is 30545237182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28173254503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28173254533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308058 + ... + 388903.

It is an arithmetic number, because the mean of its divisors is an integer number (7043497972).

Almost surely, 2^28173254503 is an apocalyptic number.

28173254503 is a deficient number, since it is larger than the sum of its proper divisors (737385).

28173254503 is an equidigital number, since it uses as much as digits as its factorization.

28173254503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737384.

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 28173254503 in words is "twenty-eight billion, one hundred seventy-three million, two hundred fifty-four thousand, five hundred three".