28317653563 has 4 divisors (see below), whose sum is σ = 28321478920. Its totient is φ = 28313828208.

The previous prime is 28317653543. The next prime is 28317653641. The reversal of 28317653563 is 36535671382.

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

It is a cyclic number.

It is not a de Polignac number, because 28317653563 - 2⁵ = 28317653531 is a prime.

It is a super-3 number, since 3×28317653563³ (a number of 32 digits) contains 333 as substring.

It is the 168279-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28317653503) by changing a digit.

It is a nontrivial repunit in base 168278.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1901553 + ... + 1916386.

It is an arithmetic number, because the mean of its divisors is an integer number (7080369730).

Almost surely, 2^28317653563 is an apocalyptic number.

28317653563 is a deficient number, since it is larger than the sum of its proper divisors (3825357).

28317653563 is an equidigital number, since it uses as much as digits as its factorization.

28317653563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825356.

The product of its digits is 2721600, while the sum is 49.

The spelling of 28317653563 in words is "twenty-eight billion, three hundred seventeen million, six hundred fifty-three thousand, five hundred sixty-three".