28125752163 has 4 divisors (see below), whose sum is σ = 37501002888. Its totient is φ = 18750501440.

The previous prime is 28125752111. The next prime is 28125752183. The reversal of 28125752163 is 36125752182.

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 28125752163 - 2⁶ = 28125752099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28125752183) 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, 4687625358 + ... + 4687625363.

It is an arithmetic number, because the mean of its divisors is an integer number (9375250722).

Almost surely, 2^28125752163 is an apocalyptic number.

28125752163 is a deficient number, since it is larger than the sum of its proper divisors (9375250725).

28125752163 is an equidigital number, since it uses as much as digits as its factorization.

28125752163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9375250724.

The product of its digits is 201600, while the sum is 42.

The spelling of 28125752163 in words is "twenty-eight billion, one hundred twenty-five million, seven hundred fifty-two thousand, one hundred sixty-three".