28124307706647 has 4 divisors (see below), whose sum is σ = 37499076942200. Its totient is φ = 18749538471096.

The previous prime is 28124307706519. The next prime is 28124307706711. The reversal of 28124307706647 is 74660770342182.

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

It is not a de Polignac number, because 28124307706647 - 2⁷ = 28124307706519 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 (28124307705647) 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, 4687384617772 + ... + 4687384617777.

It is an arithmetic number, because the mean of its divisors is an integer number (9374769235550).

Almost surely, 2^{28124307706647} is an apocalyptic number.

28124307706647 is a deficient number, since it is larger than the sum of its proper divisors (9374769235553).

28124307706647 is an equidigital number, since it uses as much as digits as its factorization.

28124307706647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9374769235552.

The product of its (nonzero) digits is 18966528, while the sum is 57.

The spelling of 28124307706647 in words is "twenty-eight trillion, one hundred twenty-four billion, three hundred seven million, seven hundred six thousand, six hundred forty-seven".