12157185855 has 8 divisors (see below), whose sum is σ = 19451497392. Its totient is φ = 6483832448.

The previous prime is 12157185851. The next prime is 12157185883. The reversal of 12157185855 is 55858175121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12157185855 - 2² = 12157185851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12157185851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405239514 + ... + 405239543.

It is an arithmetic number, because the mean of its divisors is an integer number (2431437174).

Almost surely, 2^12157185855 is an apocalyptic number.

12157185855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12157185855 is a deficient number, since it is larger than the sum of its proper divisors (7294311537).

12157185855 is an equidigital number, since it uses as much as digits as its factorization.

12157185855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810479065.

The product of its digits is 560000, while the sum is 48.

The spelling of 12157185855 in words is "twelve billion, one hundred fifty-seven million, one hundred eighty-five thousand, eight hundred fifty-five".