28163742646 has 32 divisors (see below), whose sum is σ = 45722880000. Its totient is φ = 12933732000.

The previous prime is 28163742619. The next prime is 28163742653. The reversal of 28163742646 is 64624736182.

It is a self number, because there is not a number n which added to its sum of digits gives 28163742646.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9781035 + ... + 9783913.

It is an arithmetic number, because the mean of its divisors is an integer number (1428840000).

Almost surely, 2^28163742646 is an apocalyptic number.

28163742646 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28163742646 is a deficient number, since it is larger than the sum of its proper divisors (17559137354).

28163742646 is a wasteful number, since it uses less digits than its factorization.

28163742646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4644.

The product of its digits is 2322432, while the sum is 49.

The spelling of 28163742646 in words is "twenty-eight billion, one hundred sixty-three million, seven hundred forty-two thousand, six hundred forty-six".