12155590027 has 4 divisors (see below), whose sum is σ = 13892102896. Its totient is φ = 10419077160.

The previous prime is 12155589997. The next prime is 12155590061. The reversal of 12155590027 is 72009555121.

12155590027 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12155590027 - 2²³ = 12147201419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12155590127) 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 3 ways as a sum of consecutive naturals, for example, 868256424 + ... + 868256437.

It is an arithmetic number, because the mean of its divisors is an integer number (3473025724).

Almost surely, 2^12155590027 is an apocalyptic number.

12155590027 is a deficient number, since it is larger than the sum of its proper divisors (1736512869).

12155590027 is an equidigital number, since it uses as much as digits as its factorization.

12155590027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736512868.

The product of its (nonzero) digits is 31500, while the sum is 37.

The spelling of 12155590027 in words is "twelve billion, one hundred fifty-five million, five hundred ninety thousand, twenty-seven".