27642655171123 has 4 divisors (see below), whose sum is σ = 27642729818160. Its totient is φ = 27642580524088.

The previous prime is 27642655171121. The next prime is 27642655171213. The reversal of 27642655171123 is 32117155624672.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27642655171123 - 2¹ = 27642655171121 is a prime.

It is a super-2 number, since 2×27642655171123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27642655171121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36765268 + ... + 37509601.

It is an arithmetic number, because the mean of its divisors is an integer number (6910682454540).

Almost surely, 2^{27642655171123} is an apocalyptic number.

27642655171123 is a deficient number, since it is larger than the sum of its proper divisors (74647037).

27642655171123 is an equidigital number, since it uses as much as digits as its factorization.

27642655171123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74647036.

The product of its digits is 4233600, while the sum is 52.

The spelling of 27642655171123 in words is "twenty-seven trillion, six hundred forty-two billion, six hundred fifty-five million, one hundred seventy-one thousand, one hundred twenty-three".