12801805547 has 4 divisors (see below), whose sum is σ = 12802234200. Its totient is φ = 12801376896.

The previous prime is 12801805537. The next prime is 12801805603. The reversal of 12801805547 is 74550810821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74550810821 = 17 ⋅4385341813.

It is a cyclic number.

It is not a de Polignac number, because 12801805547 - 2²⁰ = 12800756971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12801805537) 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, 165878 + ... + 230475.

It is an arithmetic number, because the mean of its divisors is an integer number (3200558550).

Almost surely, 2^12801805547 is an apocalyptic number.

12801805547 is a deficient number, since it is larger than the sum of its proper divisors (428653).

12801805547 is an equidigital number, since it uses as much as digits as its factorization.

12801805547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428652.

The product of its (nonzero) digits is 89600, while the sum is 41.

The spelling of 12801805547 in words is "twelve billion, eight hundred one million, eight hundred five thousand, five hundred forty-seven".