12805204855 has 8 divisors (see below), whose sum is σ = 15416300592. Its totient is φ = 10210794048.

The previous prime is 12805204847. The next prime is 12805204859. The reversal of 12805204855 is 55840250821.

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 12805204855 - 2³ = 12805204847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12805204859) 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, 4169542 + ... + 4172611.

It is an arithmetic number, because the mean of its divisors is an integer number (1927037574).

Almost surely, 2^12805204855 is an apocalyptic number.

12805204855 is a deficient number, since it is larger than the sum of its proper divisors (2611095737).

12805204855 is an equidigital number, since it uses as much as digits as its factorization.

12805204855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8342465.

The product of its (nonzero) digits is 128000, while the sum is 40.

The spelling of 12805204855 in words is "twelve billion, eight hundred five million, two hundred four thousand, eight hundred fifty-five".