27386609121 has 9 divisors (see below), whose sum is σ = 39559152529. Its totient is φ = 18257408436.

The previous prime is 27386609113. The next prime is 27386609123. The reversal of 27386609121 is 12190668372.

The square root of 27386609121 is 165489.

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

27386609121 is a `hidden beast` number, since 2 + 7 + 38 + 6 + 609 + 1 + 2 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 27386609121 - 2³ = 27386609113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27386609123) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 468886 + ... + 524048.

Almost surely, 2^27386609121 is an apocalyptic number.

27386609121 is the 165489-th square number.

27386609121 is the 82745-th centered octagonal number.

It is an amenable number.

27386609121 is a deficient number, since it is larger than the sum of its proper divisors (12172543408).

27386609121 is an frugal number, since it uses more digits than its factorization.

27386609121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110332 (or 55166 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 27386609121 in words is "twenty-seven billion, three hundred eighty-six million, six hundred nine thousand, one hundred twenty-one".