27728168553 has 12 divisors (see below), whose sum is σ = 40339943280. Its totient is φ = 18352456056.

The previous prime is 27728168537. The next prime is 27728168591. The reversal of 27728168553 is 35586182772.

27728168553 is a `hidden beast` number, since 2 + 7 + 7 + 2 + 81 + 6 + 8 + 553 = 666.

It is not a de Polignac number, because 27728168553 - 2⁴ = 27728168537 is a prime.

It is a super-2 number, since 2×27728168553² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27728168553.

It is not an unprimeable number, because it can be changed into a prime (27728168593) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11081151 + ... + 11083652.

It is an arithmetic number, because the mean of its divisors is an integer number (3361661940).

Almost surely, 2^27728168553 is an apocalyptic number.

It is an amenable number.

27728168553 is a deficient number, since it is larger than the sum of its proper divisors (12611774727).

27728168553 is a wasteful number, since it uses less digits than its factorization.

27728168553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22164948 (or 22164945 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 54.

The spelling of 27728168553 in words is "twenty-seven billion, seven hundred twenty-eight million, one hundred sixty-eight thousand, five hundred fifty-three".