28081660654 has 8 divisors (see below), whose sum is σ = 43574990760. Its totient is φ = 13556663736.

The previous prime is 28081660583. The next prime is 28081660657. The reversal of 28081660654 is 45606618082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081660657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242083224 + ... + 242083339.

It is an arithmetic number, because the mean of its divisors is an integer number (5446873845).

Almost surely, 2^28081660654 is an apocalyptic number.

28081660654 is a deficient number, since it is larger than the sum of its proper divisors (15493330106).

28081660654 is a wasteful number, since it uses less digits than its factorization.

28081660654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484166594.

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 28081660654 in words is "twenty-eight billion, eighty-one million, six hundred sixty thousand, six hundred fifty-four".