27728574466 has 8 divisors (see below), whose sum is σ = 41598813564. Its totient is φ = 13862303280.

The previous prime is 27728574463. The next prime is 27728574491. The reversal of 27728574466 is 66447582772.

It can be written as a sum of positive squares in 2 ways, for example, as 20336186025 + 7392388441 = 142605^2 + 85979^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 27728574466.

It is not an unprimeable number, because it can be changed into a prime (27728574463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974445 + ... + 1002496.

Almost surely, 2^27728574466 is an apocalyptic number.

27728574466 is a deficient number, since it is larger than the sum of its proper divisors (13870239098).

27728574466 is a wasteful number, since it uses less digits than its factorization.

27728574466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1983956.

The product of its digits is 31610880, while the sum is 58.

The spelling of 27728574466 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred seventy-four thousand, four hundred sixty-six".