27651366369 has 27 divisors (see below), whose sum is σ = 43910653969. Its totient is φ = 16755078120.

The previous prime is 27651366361. The next prime is 27651366373. The reversal of 27651366369 is 96366315672.

The square root of 27651366369 is 166287.

It is a perfect power (a square), and thus also a powerful number.

27651366369 is a `hidden beast` number, since 2 + 7 + 6 + 513 + 6 + 63 + 69 = 666.

It is not a de Polignac number, because 27651366369 - 2³ = 27651366361 is a prime.

It is a super-2 number, since 2×27651366369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27651366361) 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 26 ways as a sum of consecutive naturals, for example, 5484952 + ... + 5489990.

Almost surely, 2^27651366369 is an apocalyptic number.

27651366369 is the 166287-th square number.

27651366369 is the 83144-th centered octagonal number.

It is an amenable number.

27651366369 is a deficient number, since it is larger than the sum of its proper divisors (16259287600).

27651366369 is an frugal number, since it uses more digits than its factorization.

27651366369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10106 (or 5053 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 54.

The spelling of 27651366369 in words is "twenty-seven billion, six hundred fifty-one million, three hundred sixty-six thousand, three hundred sixty-nine".