28124307706646 has 4 divisors (see below), whose sum is σ = 42186461559972. Its totient is φ = 14062153853322.

The previous prime is 28124307706519. The next prime is 28124307706711. The reversal of 28124307706646 is 64660770342182.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 28124307706591 and 28124307706600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7031076926660 + ... + 7031076926663.

It is an arithmetic number, because the mean of its divisors is an integer number (10546615389993).

Almost surely, 2^{28124307706646} is an apocalyptic number.

28124307706646 is a deficient number, since it is larger than the sum of its proper divisors (14062153853326).

28124307706646 is a wasteful number, since it uses less digits than its factorization.

28124307706646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14062153853325.

The product of its (nonzero) digits is 16257024, while the sum is 56.

The spelling of 28124307706646 in words is "twenty-eight trillion, one hundred twenty-four billion, three hundred seven million, seven hundred six thousand, six hundred forty-six".