12040423555 has 4 divisors (see below), whose sum is σ = 14448508272. Its totient is φ = 9632338840.

The previous prime is 12040423543. The next prime is 12040423627. The reversal of 12040423555 is 55532404021.

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

It is not a de Polignac number, because 12040423555 - 2⁵ = 12040423523 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204042351 + ... + 1204042360.

It is an arithmetic number, because the mean of its divisors is an integer number (3612127068).

Almost surely, 2^12040423555 is an apocalyptic number.

12040423555 is a deficient number, since it is larger than the sum of its proper divisors (2408084717).

12040423555 is an equidigital number, since it uses as much as digits as its factorization.

12040423555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408084716.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 12040423555 its reverse (55532404021), we get a palindrome (67572827576).

The spelling of 12040423555 in words is "twelve billion, forty million, four hundred twenty-three thousand, five hundred fifty-five".