28685455603 has 4 divisors (see below), whose sum is σ = 32783377840. Its totient is φ = 24587533368.

The previous prime is 28685455577. The next prime is 28685455613. The reversal of 28685455603 is 30655458682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30655458682 = 2 ⋅15327729341.

It is a cyclic number.

It is not a de Polignac number, because 28685455603 - 2¹⁷ = 28685324531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28685455613) 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, 2048961108 + ... + 2048961121.

It is an arithmetic number, because the mean of its divisors is an integer number (8195844460).

Almost surely, 2^28685455603 is an apocalyptic number.

28685455603 is a deficient number, since it is larger than the sum of its proper divisors (4097922237).

28685455603 is an equidigital number, since it uses as much as digits as its factorization.

28685455603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097922236.

The product of its (nonzero) digits is 6912000, while the sum is 52.

The spelling of 28685455603 in words is "twenty-eight billion, six hundred eighty-five million, four hundred fifty-five thousand, six hundred three".